86 Controls in detailLocking and unlocking
Loss of remote control with folding key
If you lose a remote control or the folding 
key, you should do the following:
Have the remote control deactivated 
by an authorized Mercedes-Benz Light 
Truck Center.
Report the loss of the remote control or 
the folding key immediately to your car 
insurance company.
If necessary have the mechanical lock 
replaced.
Your authorized Mercedes-Benz Light 
Truck Center will be glad to supply you 
with a replacement.
Opening the doors from the inside
You can open a locked door from the in-
side. Open door only when conditions are 
safe to do so.
1Locking knob
2Inside door handle
Pull on door handle2.
If a door was locked, locking knob1 
will move up.
!If you can no longer lock or unlock the 
vehicle with the remote control, then 
the batteries in the remote control are 
discharged, the remote control is mal-
functioning or the vehicle battery is 
drained.
Use the folding key to unlock or 
lock the doors and the liftgate.
Check the vehicle battery 
(page 261).
Replace batteries (
page 243).
Synchronize the remote control 
(page 244).
If the remote control is malfunctioning, 
contact an authorized Mercedes-Benz 
Light Truck Center. 
243 Practical hints
Unlocking/locking in an emergency
Locking the vehicle
If you are unable to lock the vehicle with 
the remote control, lock it with the me-
chanical key as follows:
Close the passenger doors and the lift-
gate.
Press the upper part of the central 
locking button in the cockpit 
(page 89).
Check to see whether the locking 
knobs on the passenger doors are still 
visible. If necessary push them down 
manually.
Lock the liftgate if necessary from in-
side (
page 87).
Lock the driver’s door with the me-
chanical key.
Changing batteries
If the batteries in the remote control are 
discharged, the vehicle can no longer be 
locked or unlocked. It is recommended to 
have the batteries replaced at an autho-
rized Mercedes-Benz Light Truck Center.
Batteries contain materials that can harm 
the environment if disposed of improperly. 
Recycling of batteries is the preferred 
method of disposal. Many states require 
sellers of batteries to accept old batteries 
for recycling.1Release button
2Battery cover
Replacement batteries: Lithium, type 
CR 2025 or equivalent.
Unfold the key by pressing release 
button1.
Warning!
G
Keep the batteries out of reach of children.
If a battery is swallowed, seek medical help 
immediately.
iWhen changing batteries, always re-
place both batteries.
The required replacement batteries are 
available at any Mercedes-Benz Light 
Truck Center.