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74
Opening and closing
specialist workshop or to a collection
point for used batteries.
Requirements
You require a CR 2032 3 V cell battery.
R
Mercedes-Benz recommends that you have the
battery replaced at a qualified specialist work-
shop.
Remove the mechanical key (
/
#
Press release knob
2
down fully and slide
#
cover
1
in the direction of the arrow.
Fold out cover
1
#
and remove.
Remove battery compartment
#
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 battery
when doing this.
Push in battery compartment 3.
page 73).
#
Re-attach cover
#
engages.
Problems with the key, troubleshooting
You can no longer lock or unlock the vehicle
Possible causes are:
The key battery is weak or discharged.
R
Check the battery using the indicator lamp
#
(
page 71).
/
Replace the key battery, if necessary
#
(
page 73).
/
Use the replacement key.
#
in the direction of the arrow
#
3
and take
#
There is interference from a powerful radio signal
source
Possible causes if the function of the key is
impaired:
R
1
and push it until it
R
R
R
#
You have lost a key
#
Use the mechanical key to lock or unlock
(
page 78).
/
Have key checked at a qualified specialist
workshop.
high voltage power lines
mobile phones
electronic devices (notebooks, tablets)
shielding due to metal objects or induction
loops for electrical gate systems or automatic
barriers
Make sure that there is sufficient distance
between the key and the potential source of
interference.
Have the key deactivated at a qualified spe-
cialist workshop.
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