Online Owner's Manual [In depth | Mode

General notes

The scope and regularity of the maintenance work primarily depend on the often diverse operating conditions.

The vehicle Maintenance Booklet describes the scope and frequency of maintenance work and contains additional notes on the warranty and on service products.

Specialist knowledge beyond the scope of these Operating Instructions is required when carrying out testing and maintenance work. Have this work carried out by trained personnel.

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Maintenance services must be carried out in accordance with the provisions and recommendations in the Maintenance Booklet.

Not doing so could void the warranty claim and lead to refusal of goodwill gestures after the manufacturer has submitted a damage report.

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WARNING

Before carrying out maintenance operations and repairs, you must read the sections referring to maintenance operations and repairs:

this includes relevant sections of the technical documentation, such as the operating instructions and workshop information.
you should also familiarise yourself with the legal requirements, such as work safety regulations and accident prevention measures.

You could otherwise fail to recognise dangers and thereby injure yourself or others.

You must secure the vehicle on axle stands of sufficient load bearing capacity if work is being carried out beneath it.

Never use the vehicle jack instead of stands. The jack could slip and the vehicle could drop. This could result in serious injury to yourself or others.

The vehicle jack is intended only to raise the vehicle for a short time.

Always have maintenance work carried out at a qualified specialist workshop. The workshop must have the necessary specialist knowledge and tools to carry out the work required. Mercedes-Benz recommends that you use a Mercedes-Benz Service Centre for this purpose. All work relevant to safety or on safety-related systems must be carried out at a qualified specialist workshop.

Observe the notes on parts in the "Technical data" section more.

Environmental note

Observe measures to protect the environment when working on the vehicle. You must observe the legal requirements when disposing of service products, e.g. engine oil. This also includes all components, e.g. filters, which have come into contact with service products.

Any qualified specialist workshop, e.g. a Mercedes-Benz Service Centre, can provide information about this.

Dispose of empty containers, cleaning cloths and care products in an environmentally-responsible manner. Comply with the instructions for use of the care products.

Do not run the engine for longer than necessary when the vehicle is stationary.

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Bonnet

WARNING

Do not pull the release lever while the vehicle is in motion. The front flap may otherwise open and block your view.

Only open the front flap when the vehicle is parked.

WARNING

There is a risk of injury if the front flap is open, even if the engine is not running.

Some engine components can become very hot. To avoid the risk of burns, only touch those components described in the Operating Instructions and observe the relevant safety notes.

The release handle for the front flap is located under the instrument panel.

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To open: pull release handle .

The front flap is released.

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Make sure that the windscreen wipers are not folded out from the windscreen. You could otherwise damage the windscreen wipers or the front flap.

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Press securing hooks upwards.

Swing the front flap upwards until the locking mechanism engages, holding the front flap in place.

WARNING

Make sure that nobody can become trapped as you close the front-flap.

To close: raise the front flap lightly.

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Pull locking lever upwards.

Lower the front flap until it is horizontal and then allow it to drop.

The front flap engages audibly.

Check that the front flap has engaged properly.

If the front flap can be raised slightly, it is not properly engaged. Open the front flap again and allow it to drop from a slightly greater height.

Do not use your hands to push the front flap down. You could damage it otherwise.

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Maintenance points under the bonnet

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Topping up the washer fluid more

Checking the coolant level and topping up the coolant more

Refilling AdBlue®more

Topping up the engine oil more

Checking the engine oil level more

Checking brake circuit 2, checking the brake fluid level and topping up the brake fluid more

Checking brake circuit 1, checking the brake fluid level and topping up the brake fluid more

Clutch mechanism, checking the brake fluid level and topping up the brake fluid more

Power steering, checking and topping up the oil level more

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Coolant level

Only top up the coolant with the vehicle standing on a level surface and with the engine switched off. The coolant temperature must be below 50 °C .

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WARNING

When opening the coolant expansion tank, there is a risk of scalding, due to hot coolant spraying out. The cooling system and coolant expansion tank are pressurised when the engine is at operating temperature. Wear gloves and eye protection.

Open the coolant expansion tank only at a coolant temperature below 50 °C .

WARNING

Coolant contains glycol and is therefore toxic. Do not swallow the coolant. See a doctor immediately if you swallow coolant.

Make sure that coolant does not come into contact with skin, eyes or clothing. In case of contact with eyes, rinse immediately with plenty of clean water. Clean affected areas of skin and clothing with soap and water immediately. Change any affected clothing immediately.

Slowly turn expansion tank cap anti-clockwise to the first detent and allow excess pressure to escape.

Turn cap further and remove it.

Top up the coolant until it is at the MAX mark. Observe the correct coolant mixture ratio and the required water quality more.

Replace cap and tighten it until the stop.

Check the cooling and heating system regularly for leaks.

Have the cause of the coolant loss traced and rectified at a qualified specialist workshop, e.g. a Mercedes-Benz Service Centre.

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Clutch mechanism and brake system

Check the brake fluid level regularly, e.g. weekly or when refuelling.

WARNING

Brake fluid is hazardous to health. Do not swallow brake fluid. See a doctor immediately if you swallow brake fluid.

Make sure that brake fluid does not come into contact with skin, clothing or eyes. Rinse affected areas with plenty of clean water and consult a doctor if necessary.

Always wear gloves and eye protection when topping up brake fluid.

Store brake fluid only in the original closed container and keep it out of the reach of children. Comply with safety regulations when handling brake fluid.

WARNING

If the boiling point of the brake fluid is too low, vapour pockets may form in the brake system when the brakes are subjected to a heavy load (e.g. on long downhill stretches). This would impair braking efficiency. The vehicle's stopping distance may then be longer. This increases the risk of an accident.

Every 2 years, have the brake fluid renewed with a brake fluid approved by Mercedes-Benz and have this confirmed in the Maintenance Booklet.

Only check the brake fluid level when the vehicle is on a level surface and the engine is switched off.

Depending on the vehicle equipment, you can use the supply reservoir to check the fluid level of the following system:

hydraulic brake system
hydraulic clutch mechanism
hydraulic differential lock mechanism

Have the brake fluid in the hydraulic clutch mechanism replaced every 3 years, if possible in spring.

The reservoirs are located in the engine compartment.

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Reservoir for brake circuit 1 - front axle

Reservoir for brake circuit 2 - rear axle

Clutch fluid reservoir

The brake fluid must be between the MIN and MAX marks in each supply reservoir.

There is usually a notice in the engine compartment to remind you when the next brake fluid change is due.

Brake fluid corrodes paint, plastic and rubber. If brake fluid comes into contact with paint, plastic or rubber, rinse with water immediately.

If the brake fluid does not reach the MIN mark, the vehicle's hydraulic system could be faulty. Do not top up the brake fluid under any circumstances. This will not rectify the malfunction.

Do not drive any further.

Have the system checked immediately at a qualified specialist workshop, e.g. a Mercedes-Benz Service Centre.

Check brake lines and hoses at regular intervals for signs of leakage or damage. Strict standards should be applied for this examination.

If you notice any signs of corrosion, areas of abrasion, squashed areas, porous areas etc., have the brake lines and brake hoses replaced at a qualified specialist workshop, e.g. a Mercedes-Benz Service Centre.

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Windscreen washer system/headlamp cleaning system

Add windscreen washer concentrate to the washer fluid all year round.

WARNING

Windscreen washer concentrate is highly flammable.

Fire, naked flames and smoking are therefore prohibited when you are handling windscreen washer concentrate.

Adapt the mixing ratio to the outside temperatures. If the temperature is above freezing, use Summerwash to prevent smearing. If there is a risk of frost, use Winterwash to prevent the water from freezing on the windscreen.

The washer fluid reservoir in the engine compartment has a capacity of approximately 10 litres.

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Mix the washer fluid to the appropriate mixing ratio in a container beforehand.

Remove washer fluid reservoir cap .

Top up with washer fluid.

Replace cap .

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Engine oil level

You will find information about engine oil consumption in the "Driving tips" section more.

Check the engine oil level on a regular basis, e.g. weekly or each time you refuel.

To check the oil level, the vehicle must:

be at normal operating temperature
be standing on a level surface
have been standing with the engine switched off for at least five minutes

The engine must have reached the operating temperature for an extended period of time. The vehicle should have been driven at least 10 km before performing the check.

The dipstick and the filler neck are underneath the bonnet.

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Pull out oil dipstick .

Wipe oil dipstick using a lint-free cloth.

Insert dipstick back into the dipstick tube to the stop and remove it again.

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Check the oil level on oil dipstick .

The oil level must be between the MIN mark and MAX mark.

Top up the engine oil if necessary.

The difference in the quantity of oil between the upper and lower marks on the dipstick is approximately 2 l.

You will find information about approved engine oils in the "Service products" section more and in the Service Booklet.

To top up the engine oil: unscrew the cap on filler neck .

Top up with the amount of oil required.

Do not add too much oil. If the oil level is above the MAX mark on the dipstick, too much oil has been added. This can lead to engine damage or catalytic converter damage. Have excess oil siphoned off.

Screw cap onto the filler neck.

Environmental note

When topping up the oil, take care not to spill any. If oil enters the soil or waterways, it is harmful to the environment.

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Oil level in the power steering

When performing the oil level check:

the vehicle must be standing level
the engine must be running

The reservoir for the power-steering oil is located in the engine compartment.

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Pull out the engine oil dipstick.

The power-steering oil level is correct if the oil level is between the lower and upper marks on the dipstick.

If the oil does not reach the MIN mark, the vehicle's hydraulic system may be malfunctioning.

Have the system checked immediately at a qualified specialist workshop, e. g. at a Mercedes-Benz Service Centre.

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Vehicle assemblies

Check the assemblies regularly for leaks. If fluid is being lost (e.g. there are oil stains where the vehicle was parked), have the cause found and rectified immediately at a qualified specialist workshop, e.g. a Mercedes-Benz Service Centre.

Environmental note

When used improperly, service products are harmful to the environment.

Do not allow service products to enter the sewage system, surface waters, ground water or soil.

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Auxiliary heating

If you sell your vehicle, you are obliged to make the buyer aware of the following points. To this end, make sure that the new owner receives these Operating Instructions.

WARNING

Vehicles with an air heater:

The heat exchanger must be replaced after ten years in accordance with the national road traffic licensing regulations.

For safety reasons, Mercedes-Benz urgently recommends having the heat exchanger replaced after ten years in a qualified specialist workshop, which has the necessary specialist knowledge and tools to carry out the work required.

Mercedes-Benz recommends that you use a Mercedes-Benz Service Centre for this purpose. In particular, work relevant to safety or on safety-related systems must be carried out at a qualified specialist workshop.

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Lubrication

Lubricate the kingpin more frequently according to the operating conditions.

Only use high-pressure grease guns with a lubricating pressure not exceeding 40,000 kPa (400 bar/5,802 psi). If the grease gun has no safety device, it may damage bearing points, seals, etc. when in use.

Observe the instructions issued by the manufacturer when lubricating special-purpose bodies or other special equipment.

Clean the pressure grease fittings carefully before lubricating.

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Checking the anti-corrosion protection

Body cavity protection and underbody protection are standard on the cab.

Note that road salt is corrosive. In winter, wash the vehicle more frequently in order to remove salt residue.

Check the vehicle frequently for signs of corrosion damage. Pay special attention to possible damage of compressed-air lines and hydraulic lines.

As a precautionary measure, spray the underside of the vehicle with a wax-based protective agent.

Repair any damage to the anti-corrosion protection applied at the factory.

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Replacing the wiper blades

WARNING

Remove the key from the ignition lock before replacing the wiper blades. The windscreen wipers could otherwise be set in motion and injure you.

WARNING

Wiper blades are wear parts. Change the wiper blades every six months, ideally in the spring and autumn. Otherwise, the windscreen and rear window will not be wiped properly. This may prevent you from observing the traffic conditions, thereby causing an accident.

Do not open the bonnet when a wiper arm is folded away from the windscreen. Otherwise, you could damage the bonnet.

Do not fold the wiper arms back onto the windscreen without wiper blades fitted as this could scratch the windscreen.

Only hold the wiper blade by the arm. You could otherwise damage the wiper blade rubber.

Removing

Remove the key from the ignition lock.

Fold the wiper arm away from the windscreen.

Set the wiper blade at right angles to the wiper arm.

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Press the locking springs together and push the wiper blade out of the curvature of wiper arm .

Remove the wiper blade.

Fitting

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Press the hinge piece of the wiper blade into the curvature on the wiper arm until you hear the locking springs engage.

Turn the wiper blade parallel to the wiper arm.

Fold the wiper arm onto the windscreen again.

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Batteries

WARNING

	Risk of explosion. Explosive oxyhydrogen is produced when batteries are being charged. Only charge the batteries in a well-ventilated area.
	Risk of explosion. Avoid creating sparks. Avoid fire, naked flames and do not smoke when handling the battery.
	Battery acid is caustic. Wear acid-resistant protective gloves. Any splashes of acid on skin or clothing must be neutralised immediately using soapy water or acid neutraliser and then cleaned with water.
	Wear eye protection. When mixing water and acid, the liquid may splash into your eyes. Rinse acid splashes to the eyes immediately with clean water and contact a doctor immediately.
	Keep away from children. Children are not able to evaluate the risk involved in handling batteries and acid.
	Always observe the safety instructions, protective measures and procedures specified in these Operating Instructions when handling the battery.

Environmental note

	Batteries contain pollutants. It is illegal to dispose of pollutants together with the household rubbish. They must be collected separately and recycled in an environmentally responsible manner.
	Dispose of batteries in an environmentally responsible manner. Take discharged batteries to a qualified specialist workshop, e.g. a Mercedes-Benz Service Centre, or to a special collection point for old batteries.

In order for the batteries to achieve their maximum possible service life, they must always be sufficiently charged.

Have the battery charge checked more frequently if you use the vehicle mainly for short trips or if you leave it parked up for a lengthy period.

If you intend to leave your vehicle parked up for a long period, seek advice from a Mercedes-Benz Service Centre or switch off the power supply using the battery isolating switch more.

Your vehicle is equipped with two batteries. The batteries are located in the seat base underneath the driver's seat.

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Driver's seat folded forward

Release knob

Battery

Disconnecting and connecting the battery

WARNING

There is a risk of a short circuit if the positive terminal of the connected battery comes into contact with any part of the vehicle. This could cause the flammable gas mix to ignite. You and others could be seriously injured.

Do not place any metal objects or tools on the batteries.
When disconnecting the batteries, always disconnect the negative terminal clamp before the positive terminal clamp.
When connecting the batteries, always connect the positive terminal clamp before the negative terminal clamp.
Do not disconnect or connect the batteries when the engine is running.

Switch off the engine and remove the key before you loosen or disconnect the terminal clamps. You may otherwise destroy electronic components such as the alternator.

Remove the key from the ignition lock.

Switch off all electrical consumers.

Pull out release knob and fold the driver's seat forwards.

On vehicles with BlueTec® exhaust gas aftertreatment, only disconnect the battery approximately five minutes after switching the engine off. This time is necessary to ensure correct operation of the BlueTec® exhaust gas aftertreatment system after reconnection.

To disconnect: detach and remove the negative terminal clamps so that the clamps are no longer touching the corresponding terminal.

Remove the cover of the positive terminal clamps.

Loosen and remove the positive terminal clamps.

If you remove only the negative terminal clamps from the battery, the centre tap of the battery causes a residual voltage. This could damage the vehicle's electrical systems.

For this reason, you should also remove the positive terminal clamps when disconnecting the battery.

To reconnect: connect the positive terminal clamps and fasten the caps.

Make sure that the battery terminals are not switched around.

Connect the negative terminal clamps.

WARNING

Make sure that nobody can become trapped as you fold down the driver's seat. Be especially careful if there are children near the vehicle.

Make sure that the driver's seat engages audibly when it is folded back.

If the driver's seat is not properly engaged, it could tip forward and injure you.

Pull out release knob and fold down the driver's seat.

Make sure that the driver's seat engages audibly.

Checking the battery fluid level

Check the battery fluid level once a week in summer and hot climatic regions.

Remove the key from the ignition lock.

Switch off all electrical consumers.

Fold forward the driver's seat as described in the section on disconnecting the batteries.

WARNING

Battery acid is caustic. Avoid contact with the skin, eyes or clothing.

Unscrew the caps on all battery cells.

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Check the battery fluid level.

The liquid in each battery cell must be between the min and max marks (on the side of the battery casing).

Tap water reduces the performance of the batteries. Only top up with distilled or de-ionised water.

Do not use a metal funnel when adding water. There is a risk of a short circuit.

Top up with distilled or de-ionised water if necessary.

Screw the caps onto all battery cells.

Fold down the driver's seat until it engages, as described in the section on reconnecting the batteries.

Removing and installing the battery

Have the batteries removed at a qualified specialist workshop which has the necessary specialist knowledge and tools to carry out the work required. Mercedes-Benz recommends that you use a Mercedes-Benz Service Centre for this purpose.

WARNING

Use only impact-resistant batteries with a central ventilation cap to prevent corrosion damage and to protect occupants from caustic burns in the event of an accident.

To remove: disconnect the batteries more.

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Unscrew bolts which hold the battery in place in the seat base.

Remove bolts with the rail and remove the battery.

To install: follow the steps described above in reverse order to install and secure the batteries.

Connecting the batteries more.

Charging the battery

WARNING

Never charge the battery while it is installed. The vehicle's electronics system may otherwise be damaged. Only charge the battery in a well-ventilated area. As the battery is being charged, gases can escape and generate minor explosions, which can injure you and others or may cause damage to the paintwork or acid corrosion on the vehicle.

WARNING

Avoid creating sparks. Avoid naked flames and do not smoke in the vicinity of the batteries. Do not remove the battery charger connecting clamps until the battery charger is switched off and gas is no longer escaping from the batteries. When charging a battery, make sure that the room is well ventilated.

Do not lean over the battery during the charging process and do not breathe in any gases; otherwise, you could be injured.

Remove the battery more.

Recharge the removed battery. Observe the operating instructions for the battery charger.

Follow the above steps in the reverse order to install the battery again.

Make sure that the charging voltage is correct when charging.

Use a commercially available battery charger.

Do not rapid-charge new batteries.

Battery care

Please always observe the following notes:

Dirty battery clamps and battery surfaces cause leak currents, which lead to the batteries discharging. Always keep the battery terminals and battery surfaces clean and dry. Grease the battery terminals, particularly the terminal undersides, with a light coating of acid-resistant grease.
Cleaning agents containing fuel corrode the battery housing. Only clean the battery housing with commercially available cleaning agents.
Only clean the batteries when the caps are screwed on. Dirt may otherwise enter the battery cells and damage the battery.
The breathers in the caps and the cell ventilation tubes must be open. Otherwise, gas cannot escape. Unscrew blocked breathers and clean them with a suitable tool such as a piece of wire. If you do not unscrew the caps for cleaning, there is a risk of short circuit.
Regularly check the battery terminals and the fastening of the negative cable to the chassis to ensure that they are firmly seated.
If batteries are not being used, you should charge them once a month.

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