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Requirements:
A CR 2032 3 V cell battery
R
Mercedes-Benz recommends that you have the
battery replaced by a qualified specialist work‐
shop.
Remove the emergency key (
#
Example image
Problems with the key
Problem
You cannot lock or unlock
the vehicle any more.
You have lost a key.
#
#
#
page 42).
→
#
#
#
Possible causes/consequences and
Possible causes:
the key battery is weak or discharged
R
there is interference from a powerful source of radio waves
R
the key is defective
R
Check the battery using the battery check lamp and replace if neces‐
#
sary (
page 42).
→
Use the emergency key to unlock and lock the vehicle (
#
Have the key checked at a qualified specialist workshop.
#
Have the key deactivated at a qualified specialist workshop.
#
If necessary, have the mechanical locks replaced.
#
Opening and closing
Press release button
2
down fully and slide
cover
1
forward.
Remove battery compartment
the discharged battery.
Insert the new battery into battery compart‐
ment 3. Observe the positive pole marking
in the battery compartment and on the bat‐
tery.
Insert battery compartment 3.
Replace cover
1
so that it engages.
Slide the emergency key in completely until it
engages (
→
page 42).
M M
Solutions
43
3
and remove
→
page 42).
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