Mercedes-Benz C-Sedan 2015 Owners Manual - Manual (Page 88)

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