Mercedes-Benz E-Class Coupe Operator's Manual page 80

SmartKey
78
Problem
You have lost the
mechanical key.
The engine cannot be
started using the
SmartKey.
Vehicles without
DIRECT SELECT lever
only:
The engine cannot be
started using the
SmartKey.
The engine cannot be
started using KEYLESS-
GO. The SmartKey is in
the vehicle.
Possible causes/consequences and M Solutions
X
Report the loss immediately to the vehicle insurers.
X
If necessary, have the locks changed as well.
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 312).
or
X
Jump-start the vehicle (
or
X
Consult a qualified specialist workshop.
The steering lock is mechanically blocked.
X
Remove the SmartKey and reinsert it into the ignition lock. While
doing this, turn the steering wheel in both directions.
A door is open. Therefore, the SmartKey cannot be detected as
easily.
X
Close the door and try to start the vehicle again.
There is interference from a powerful source of radio waves.
X
Start your vehicle with the SmartKey in the ignition lock.
Y page 313).