Date of printing:

05/16/2022

Online Owner's Manual [In depth | Maintenance and care | Battery]

Owner's Manual version: 06-13

Note: The online Owner's Manual is the latest version available. Deviations between this manual and items specific to your vehicle may occur since Mercedes-Benz constantly adapts its vehicles to the latest technology and modifies design and equipment. Please note that this online Owner's Manual does not under any circumstances replace the printed Owner's Manual which is supplied with the vehicle.

Battery

Important safety notes

Risk of explosion. Explosive oxyhydrogen is produced when batteries are being charged. Only charge batteries in well-ventilated areas.

Risk of explosion. Avoid creating sparks. Avoid naked flames and do not smoke in the vicinity of the battery.

Battery acid is caustic. Wear acid-proof protective gloves. If skin or clothes are splashed with acid, neutralise the splashes immediately with soapy water or an acid neutraliser, then clean the affected areas with water.

Wear eye protection. When mixing water and acid, the liquid can splash into your eyes. Rinse acid splashes to the eyes immediately with clean water and contact a doctor immediately.

Keep children at a safe distance. Children are not able to assess the dangers posed by batteries and acid.

When handling batteries, observe the safety precautions and special protective measures contained in these Operating Instructions.

../../../../global/pictures_mb/symb_baum.png

Environmental note

Batteries contain pollutants. It is illegal to dispose of them with the household rubbish. They must be collected separately and disposed of in an environmentally responsible recycling system.

Dispose of batteries in an environmentally responsible manner. Take discharged batteries to a qualified specialist workshop or to a collection point for used batteries.

Observe the following notes:

  • 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.

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

  • If your vehicle requires jump-starting, or if you wish to provide jump-starting assistance to another vehicle, only use the jump-starting connection point in the engine compartment more.

  • Only replace a battery with a battery that has been recommended by Mercedes-Benz.

  • Have the battery removed at a qualified specialist workshop.

../../../../global/pictures_mb/symb_info.png

When you park the vehicle, remove the key if you do not require any electrical consumers. The vehicle will then use very little energy, thus conserving battery power.

Installation locations

Your vehicle may be equipped with two batteries, depending on the equipment version:

  • the starter battery is located in the base of the driver's seat.

  • the additional battery is located in the base of the co-driver's seat.

Disconnecting and removing

../../../../global/pictures_mb/symb_achtung.png

WARNING

During the charging process, a battery produces hydrogen gas. If a short circuit occurs or sparks are created, the hydrogen gas can ignite. There is a risk of an explosion.

  • Make sure that the positive terminal of a connected battery does not come into contact with vehicle parts.

  • Never place metal objects or tools on a battery.

  • It is important that you observe the described order of the battery terminals when connecting and disconnecting a battery.

  • When jump-starting, make sure that the battery poles with identical polarity are connected.

  • It is particularly important to observe the described order when connecting and disconnecting the jump leads.

  • Never connect or disconnect the battery terminals while the engine is running.

../../../../global/pictures_mb/symb_ruf.png

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.

../../../../global/pictures_mb/symb_ruf.png

Always disconnect the battery in the order described below. Never mix up the terminal clamp disconnection/connection order and never mix up the terminal clamps. You may otherwise damage the vehicle electronics.

images/imgef90fa4aa41625e6351f1914647a34c5_1_--_--_JPG72.jpg Seat base (example, driver's seat)

The following description on disconnecting and removing the battery is based upon the example of the starter battery in the seat base of the driver's seat. The additional battery is disconnected and removed in the same way as the starter battery. The additional battery is located in the seat base of the co-driver's seat.

Switch off all electrical consumers.

Switch off the engine and remove the key from the ignition lock.

Open the driver’s door.

If you want to disconnect/remove the additional battery, open the co-driver's door. The additional battery is located in the seat base of the co-driver's seat.

Turn rotary catch mbsymb6_inv_003a.png anti-clockwise.

Remove cover mbsymb6_inv_003b.png.

images/img8939a067f7288690351f1914381eb319_1_--_--_JPG72.jpg Open seat base (example, driver's seat)

Remove screws mbsymb6_inv_003d.png from holder mbsymb6_inv_003f.png.

Remove holder mbsymb6_inv_003f.png.

Remove breather hose mbsymb6_inv_0041.png from the top of the battery.

Pull the battery out of the seat base until the negative clamp can be released and removed.

Disconnect the negative clamp from negative terminal mbsymb6_inv_0042.png.

Remove the negative clamp in such a way that the battery cable terminal no longer touches negative terminal mbsymb6_inv_0042.png.

images/img26170cf3f72925e8351f19143522f48c_1_--_--_JPG72.jpg Example: starter battery

Remove the battery from the seat base and place it on the door sill panel as shown. If necessary, hold the battery by handles mbsymb6_inv_0043.png.

Remove the positive clamp cover from positive terminal mbsymb6_inv_0045.png.

Loosen the positive clamp on positive terminal mbsymb6_inv_0045.png.

Remove the positive clamp in such a way that the battery cable terminal no longer touches positive terminal mbsymb6_inv_0045.png.

Lift the battery from the door sill panel by handles mbsymb6_inv_0043.png.

Reconnecting and fitting

../../../../global/pictures_mb/symb_achtung.png

WARNING

During the charging process, a battery produces hydrogen gas. If a short circuit occurs or sparks are created, the hydrogen gas can ignite. There is a risk of an explosion.

  • Make sure that the positive terminal of a connected battery does not come into contact with vehicle parts.

  • Never place metal objects or tools on a battery.

  • It is important that you observe the described order of the battery terminals when connecting and disconnecting a battery.

  • When jump-starting, make sure that the battery poles with identical polarity are connected.

  • It is particularly important to observe the described order when connecting and disconnecting the jump leads.

  • Never connect or disconnect the battery terminals while the engine is running.

../../../../global/pictures_mb/symb_ruf.png

Always connect the battery in the order described below. Never mix up the terminal clamp disconnection/connection order and never mix up the terminal clamps. You will otherwise damage the vehicle electronics.

Always observe the specified installation position for the positive terminal. The positive terminal may otherwise come into contact with vehicle parts. This results in a risk of short circuit and fire.

The following description on connecting and fitting the battery is based upon the example of the starter battery in the seat base of the driver's seat. The additional battery is connected and fitted in the same way as the starter battery. The additional battery is located in the seat base of the co-driver's seat.

Place the battery on the door sill panel as shown more and hold by handles mbsymb6_inv_0043.png if necessary.

Connect the positive clamp to positive terminal mbsymb6_inv_0045.png. Always observe the positive terminal installation position shown when doing so. Positive lead mbsymb6_inv_0044.png must be routed parallel to the side of the battery housing in the connection area (see arrow).

Place the positive clamp cover on positive terminal mbsymb6_inv_0045.png.

Fold both handles mbsymb6_inv_0043.png down onto the battery.

Push the battery into the seat base until the negative terminal can be connected.

Connect the negative clamp to negative terminal mbsymb6_inv_0042.png.

Push the battery into the seat base as far as it will go.

Push breather hose mbsymb6_inv_0041.png onto the battery connection at the top.

Guide holder mbsymb6_inv_003f.png over the lower side of the battery housing and the threads for screws mbsymb6_inv_003d.png.

Screw on holder mbsymb6_inv_003f.png with screws mbsymb6_inv_003d.png.

The battery is secured to prevent slipping.

Replace cover mbsymb6_inv_003b.png.

Turn rotary catch mbsymb6_inv_003a.png clockwise.

Carry out the following work after connecting the battery:

Reset the side windows more.

Completely open and close the electrical sliding doors once by hand.

Charging

../../../../global/pictures_mb/symb_achtung.png

WARNING

During charging and jump-starting, explosive gases can escape from the battery. There is a risk of an explosion.

Particularly avoid fire, naked flames, creating sparks and smoking. Ensure there is sufficient ventilation while charging and jump-starting. Do not lean over a battery.

../../../../global/pictures_mb/symb_achtung.png

WARNING

Battery acid is caustic. There is a risk of injury.

Avoid contact with the skin, eyes or clothing. Do not inhale any battery gases. Do not lean over the battery. Keep children away from batteries. Wash battery acid immediately with water and seek medical attention.

../../../../global/pictures_mb/symb_ruf.png

Only charge the fitted battery with a battery charger that has been tested and approved by Mercedes-Benz. This device allows the battery to be charged when it is fitted in the vehicle. The vehicle's electronics system may otherwise be damaged.

Recharge the removed battery. Observe the notes in the operating instructions for your battery charger.

Fit the battery. Observe the notes on reconnecting the battery.

../../../../global/pictures_mb/symb_info.png

If batteries are not being used, you should charge them once a month.

Care

../../../../global/pictures_mb/symb_ruf.png

Dirty battery terminals and battery surfaces cause creepage current. This can cause the batteries to discharge.

../../../../global/pictures_mb/symb_ruf.png

Do not use any cleaning agents containing fuel. Cleaning agents containing fuel corrode the battery housing.

../../../../global/pictures_mb/symb_ruf.png

If dirt enters the battery cell, self-discharging of the battery is increased and the battery may be damaged.

The following points on battery care must be observed:

Regularly check the battery terminals and the fastening of the negative cable to the chassis to ensure that they are firmly seated.

Always keep the battery terminals and battery surfaces clean and dry.

Lightly grease the undersides of the battery terminals with acid-resistant grease.

Only clean the batteries when the caps are screwed on.

Otherwise, dirt could get into the battery cells.

Only clean the battery casing with a commercially available cleaning product.

Notes

Date of printing:

05/16/2022

Online Owner's Manual [In depth | Maintenance and care | Battery]

Owner's Manual version: 06-13

Note: The online Owner's Manual is the latest version available. Deviations between this manual and items specific to your vehicle may occur since Mercedes-Benz constantly adapts its vehicles to the latest technology and modifies design and equipment. Please note that this online Owner's Manual does not under any circumstances replace the printed Owner's Manual which is supplied with the vehicle.