Mercedes-Benz A-Class Operator's Manual page 63

Requirements:
You require a CR 2032 3 V cell battery.
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Mercedes-Benz recommends that you have the
battery replaced at a qualified specialist work‐
shop.
Remove the mechanical key (
→
#
Problems with the SmartKey
Problem
You can no longer lock or unlock the
vehicle.
Press release button
#
cover 1 in the direction of the arrow.
Fold out cover
#
arrow and remove.
Remove battery compartment
#
out the discharged battery.
page 60).
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.
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Re-attach cover
#
engages.
Possible causes/consequences and
Possible causes are:
The SmartKey battery is weak or discharged.
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There is interference from a powerful radio signal source.
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2 down fully and slide
1 in the direction of the
3 and take
1 and push it until it
M M Solutions
61
Opening and closing