Mercedes-Benz C-Coupe 2015 Owners Manual - Manual (Page 80)

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