Date of printing:

05/16/2022

Online Owner's Manual [In depth | Opening and closing | Key]

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.

Key

Important safety notes

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WARNING

If you leave children unattended in the vehicle, they may be able to set the vehicle in motion if, for example, they:

  • release the parking brake

  • shift the automatic transmission out of park position P or shift manual transmission into neutral

  • start the engine

In addition, they may operate vehicle equipment and become trapped. There is a risk of an accident and injury.

When leaving the vehicle, always take the key with you and lock the vehicle. Never leave children unattended in the vehicle.

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WARNING

If you attach heavy or large objects to the key, the key could be unintentionally turned in the ignition lock. This could cause the engine to be switched off. There is a risk of an accident.

Do not attach any heavy or large objects to the key. Remove any bulky keyrings before inserting the key into the ignition lock.

Do not keep the key:

  • with electronic devices, e.g. a mobile phone or another key

  • with metallic objects, e.g. coins or metal foil

  • in metallic objects, e.g. metal cases

This can affect the key's functionality.

Key functions

images/imgd7c0bca5aa34a6c4351f19144984f301_1_--_--_JPG72.jpg
mbsymb6_inv_003a.png Battery check lamp
mbsymb6_inv_003b.png mbsymb1_inv_0026.png To lock the vehicle centrally
mbsymb6_inv_003d.png mbsymb1_inv_0035.png To unlock the sliding doors and the tailgate/rear door or to unlock and open/close the electric sliding door
mbsymb6_inv_003f.png Emergency key element
mbsymb6_inv_0041.png mbsymb1_inv_0025.png To unlock the vehicle centrally or unlock the front door(s) only

The vehicle's equipment includes two keys. There is an emergency key element in each key.

The key can be used to unlock the vehicle from a distance. To prevent theft, only use the key in the immediate vicinity of the vehicle.

Change the batteries immediately if battery check lamp mbsymb6_inv_003a.png does not light up briefly with every press of a button more.

To unlock centrally: press the mbsymb1_inv_0025.png button.

The turn signals flash once.

If the surround lighting has been switched on using the on-board computer more, it goes on when the vehicle is unlocked.

To unlock the sliding doors and the tailgate/rear doors only: press the mbsymb1_inv_0035.png button.

The turn signals flash once.

If you do not open the vehicle within approximately 40 seconds of unlocking:

  • the vehicle is locked again.

  • the anti-theft system is primed again.

To lock centrally: press the mbsymb1_inv_0026.png button.

The turn signals flash three times if:

  • the anti-theft system is primed.

  • all the doors and the tailgate/rear door are closed.

Check the locking knobs on all the doors.

The locking knobs must all be in the lowered position.

The key's factory setting enables you to centrally lock and unlock the following:

  • the driver's and the co-driver's door

  • the sliding doors

  • the tailgate/rear door

In an emergency, the driver's or co-driver's door can also be unlocked manually using the emergency key element more.

Changing the settings of the locking system

If you travel alone a lot, you may wish to change the settings of the locking system. Press the mbsymb1_inv_0025.png button to unlock the:

  • driver's and co-driver's door (panel van)

or

  • driver's door (crewbus)

To change the setting: press and hold down the mbsymb1_inv_0025.png and mbsymb1_inv_0026.png buttons simultaneously until the battery check lamp flashes twice. more.

If the setting of the locking system is changed within the signal range of the vehicle, press the mbsymb1_inv_0026.png or mbsymb1_inv_0025.png button to:

  • lock or

  • unlock the vehicle

The key now functions as follows:

To unlock the driver's door: press the mbsymb1_inv_0025.png button once.

To unlock centrally: briefly press the mbsymb1_inv_0025.png button twice.

To lock centrally: press the mbsymb1_inv_0026.png button.

To restore to factory settings: press and hold down the mbsymb1_inv_0025.png and mbsymb1_inv_0026.png buttons simultaneously until the battery check lamp flashes twice. more.

The key unlocks the vehicle centrally again.

Emergency key element

General notes

If the vehicle can no longer be locked or unlocked with the key, use the emergency key element.

The anti-theft alarm system (ATA) is triggered when you unlock and open the vehicle using the emergency key element more.

The alarm can be disabled in the following two ways:

Press the mbsymb1_inv_0025.png or mbsymb1_inv_0026.png button on the key.

or

Insert the key into the ignition lock.

Removing the emergency key element

images/img1447d031aa327dca351f19143d9db332_1_--_--_JPG72.jpg

Slide release catch mbsymb6_inv_003a.png in the direction of the arrow and, at the same time, remove emergency key element mbsymb6_inv_003b.png from the key completely.

Locking/unlocking the vehicle using the emergency key element

Vehicles with the convenience opening/closing feature
images/img9257c45dd3e193a3351f1914247bfc51_1_--_--_JPG72.jpg Door lock for emergency unlocking on the co-driver's door
mbsymb6_inv_0031.png Unlocked
mbsymb6_inv_0032.png Locked

To unlock the co-driver's door: insert the emergency key element fully into the co-driver's door lock and turn it to position mbsymb6_inv_0031.png.

The co-driver's door is unlocked.

To lock the vehicle: lock the tailgate, rear door and all other doors except the co-driver's door from the inside. To do this, push down the door-locking knobs.

Insert the emergency key element fully into the co-driver's door lock and turn it to position mbsymb6_inv_0032.png.

The co-driver's door is locked.

Vehicles without the convenience opening/closing feature

The door lock for unlocking in an emergency is on the driver's door.

To unlock the driver's door: insert the emergency key element fully into the driver's door lock and turn it anti-clockwise.

The driver's door is unlocked.

To lock the vehicle: lock the tailgate and rear door and all other doors except the driver's door from the inside. To do this, push down the door-locking knobs.

Insert the emergency key element fully into the driver's door lock and turn it clockwise.

The driver's door is locked.

Vehicle with partition

images/img8fd949da351f15144bdaa9139ac6e5f4_1_--_--_JPG72.jpg
mbsymb6_inv_0031.png Unlocked
mbsymb6_inv_0032.png Locked

If the vehicle is equipped with a partition, it is only possible to gain access to the load compartment by using the emergency unlocking feature for the tailgate/rear doors.

Insert the emergency key element fully into the tailgate/rear door lock and turn it anti-clockwise to position mbsymb6_inv_0031.png.

The tailgate/rear door unlocks.

Battery of the key

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WARNING

Batteries contain toxic and corrosive substances. If batteries are swallowed, it can result in severe health problems. There is a risk of fatal injury.

Keep batteries out of the reach of children. If a battery is swallowed, seek medical attention immediately.

../../../../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.

images/imgb852d06818a541a235477e681fbe1fbe_1_--_--_JPG72.jpg

Change the batteries if the battery check lamp does not light up briefly with every press of a button. You need a CR 2025 3 V cell battery, which can be obtained from any qualified specialist workshop.

images/img1a9e716418a0180135477e683f443f44_1_--_--_JPG72.jpg

Pull out the emergency key element from the key more.

Push emergency key element mbsymb6_inv_003d.png into the opening in the key in the direction of the arrow until battery compartment cover mbsymb6_inv_003b.png opens. When doing so, do not hold battery compartment cover mbsymb6_inv_003b.png shut.

Remove battery compartment cover mbsymb6_inv_003b.png.

images/img7956d6e418a20bb435477e6839c039c0_1_--_--_JPG72.jpg

Tap the key against the palm of your hand so that existing battery mbsymb6_inv_003f.png falls out of the battery compartment.

Insert the new battery into the battery tray with the positive pole facing upwards. Use a lint-free cloth to do so.

Fit battery compartment cover mbsymb6_inv_003b.png to the key casing with the front lugs first and push closed.

Slide emergency key element mbsymb6_inv_003d.png back into the key.

Check the function of all key buttons on the vehicle.

Problems with the key

Problem

Possible causes/consequences and > Solutions

It is no longer possible to lock the vehicle using the key.

The turn signals do not flash when the vehicle is locked.

The doors are not closed properly.

Close the doors properly and lock the vehicle again.

The central locking system has malfunctioned.

Lock the vehicle with the emergency key element more.

Have the central locking system checked as soon as possible at a qualified specialist workshop.

It is no longer possible to lock or unlock the vehicle using the key.

The key battery is weak or discharged.

Point the tip of the key at the driver's door handle from very close range and press the mbsymb1_inv_0025.png or mbsymb1_inv_0026.png button.

If this does not work:

Replace the key battery more.

or

Lock the vehicle with the emergency key element more.

The key is faulty.

Lock the vehicle with the emergency key element more.

Have the key checked at a qualified specialist workshop.

The key cannot be turned in the ignition lock.

The key has been in position 0 for a long period of time.

Remove the key and insert it again into the ignition lock.

Check and, if necessary, replace the starter battery.

Turn the key to position 2 in the ignition lock.

The steering lock has jammed mechanically.

Remove the key and insert it again into the ignition lock. Turn the steering wheel from side to side while doing so.

The engine cannot be started using the key.

The on-board voltage is too low.

Switch off all non-essential consumers, such as interior lighting, and try to start the engine again.

If this does not work:

Check the starter battery and charge it if necessary more.

or

Jump-start the vehicle more.

or

Consult a qualified specialist workshop.

You have lost a key.

Have the key deactivated at a qualified specialist workshop.

Report the loss immediately to the vehicle insurers.

If necessary, have the mechanical locks replaced.

You have lost the emergency key element.

Report the loss immediately to the vehicle insurers.

If necessary, have the mechanical locks replaced.

Notes

Date of printing:

05/16/2022

Online Owner's Manual [In depth | Opening and closing | Key]

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.