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

SmartKey
78
Problems with the SmartKey
Problem
You cannot lock or
unlock the vehicle
using the SmartKey.
You can no longer lock
or unlock the vehicle
using KEYLESS-GO.
You have lost a Smart-
Key.
You have lost the
mechanical key.
Possible causes/consequences and M M Solutions
The SmartKey battery is discharged or nearly discharged.
Try again to lock/unlock the vehicle using the remote control
X
function of the SmartKey. Point the tip of the SmartKey at the
driver's door handle from close range and press the % or
& button.
If this does not work:
Check the SmartKey battery (
X
essary ( page 77).
Y
Lock ( page 81) or unlock (
X
Y
mechanical key.
The SmartKey is faulty.
Lock ( page 81) or unlock (
X
Y
mechanical key.
Have the SmartKey checked at a qualified specialist workshop.
X
There is interference from a powerful source of radio waves.
Lock/unlock the vehicle using the remote control function of
X
the SmartKey. Point the tip of the SmartKey at the driver's door
handle from close range and press the % / & button.
There is a malfunction with KEYLESS-GO.
Lock/unlock the vehicle using the remote control function of
X
the SmartKey. Point the tip of the SmartKey at the driver's door
handle from close range and press the % / & button.
Have KEYLESS-GO checked at a qualified specialist workshop.
X
If this does not work:
Check the SmartKey battery (
X
essary ( page 77).
Y
Lock ( page 81) or unlock (
X
Y
mechanical key.
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 77) and replace it if nec-
Y
page 81) the vehicle using the
Y
page 81) the vehicle using the
Y
page 77) and replace it if nec-
Y
page 81) the vehicle using the
Y