Mercedes-Benz S-Class Owner's Manual page 79

Mercedes-Benz recommends that you have the
battery replaced at a qualified specialist work‐
shop.
Remove the emergency key (
→
#
Problems with the key
Problem
You can no longer lock or unlock the
vehicle.
Press release button
#
remove cover 1.
Remove battery compartment
#
page 76). 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
#
Possible causes/consequences and
Possible causes:
The key battery is weak or discharged.
R
There is interference from a powerful radio signal source.
R
The key is faulty.
R
2 down fully and
3 and take
1 so that it engages.
M M Solutions
77
Opening and closing