Requirements:
R
You require a CR 2032 3 V cell battery.
Mercedes-Benz recommends that you have the
battery replaced at a qualified specialist work‐
shop.
#
Remove the mechanical key (
→
page 64).
#
Press release button
2
down fully and
remove cover
1
.
#
Remove battery compartment
3
and take
out 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.
#
Push in battery compartment
3
.
#
Replace cover
1
so that it engages.
Problems with the SmartKey
Problem
Possible causes/consequences and
M
M
Solutions
You can no longer lock or unlock the
vehicle.
Possible causes are:
R
The SmartKey battery is discharged or nearly discharged.
R
There is interference from a powerful radio signal source.
Opening and closing 65