Mercedes-Benz C-Class Operator's Manual page 88

SmartKey
86
Problem
The engine cannot be
started using the
SmartKey.
The engine cannot be
started using the Start/
Stop button. The
SmartKey is in the vehi-
cle.
You have lost a Smart-
Key.
You have lost the
mechanical key.
Possible causes/consequences and M M Solutions
The on-board voltage is too low.
Switch off non-essential consumers, e.g. seat heating or interior
X
lighting, and try to start the engine again.
If this does not work:
Check the starter battery and charge it if necessary
X
( page 347).
Y
or
Jump-start the vehicle (
X
or
Consult a qualified specialist workshop.
X
The vehicle is locked.
Unlock the vehicle and try to start the vehicle again.
X
The SmartKey battery is discharged or nearly discharged.
Check the SmartKey battery (
X
essary ( page 84).
Y
If this does not work:
Start your vehicle with the SmartKey in the ignition lock.
X
There is interference from a powerful source of radio waves.
Start your vehicle with the SmartKey in the ignition lock.
X
Have the SmartKey deactivated at a qualified specialist work-
X
shop.
Report the loss immediately to the vehicle insurers.
X
If necessary, have the locks changed as well.
X
Report the loss immediately to the vehicle insurers.
X
If necessary, have the locks changed as well.
X
page 349).
Y
page 84) and replace it if nec-
Y