Mercedes-Benz E-Class Coupe 2022 Operator's Manual page 68

66 66 Opening and closing
Press release knob 2 down fully and slide
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cover 1 in the direction of the arrow.
Fold out cover 1 in the direction of the arrow
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and remove.
Remove battery compartment 3
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out the discharged battery.
Insert the new battery into battery compart-
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ment 3. Observe the positive pole marking in
the battery compartment and on the battery
when doing this.
Push in battery compartment 3.
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Re-attach cover 1 and push it until it
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engages.
Pr Problems wit oblems with t h the Smar he SmartKey
Y Y ou can no long ou can no longer loc er lock or unloc
Possible causes:
The SmartKey battery is weak or discharged.
R
Check the battery using the indicator lamp
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( page 63).
/
Replace the SmartKey battery, if necessary
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( page 65).
/
Use the replacement SmartKey.
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Use the emergency key to lock or unlock
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( page 69).
/
Have the SmartKey checked at a quali ed spe-
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and take
cialist workshop.
Ther There is int e is interf erfer erence fr ence from a pow
sour source ce
Possible causes if the function of the SmartKey is
impaired:
High voltage power lines
R
Mobile phones
R
Electronic devices (notebooks, tablets)
R
tKey, tr , troubleshoo oubleshooting ting Shielding due to metal objects or induction
R
loops for electrical gate systems or automatic
k or unlock t k the v he vehicle ehicle
barriers
Make sure that there is su cient distance
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between the SmartKey and the potential
source of interference.
Y Y ou hav ou have los
Have the SmartKey deactivated at a quali ed
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specialist workshop.
If necessary, have the mechanical lock
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replaced as well.
om a power erful r ful radio signal adio signal
e lost a Smar t a SmartKey tKey