Mercedes-Benz GLC Coupe 2016, Owner'S Manual

Page: 89 / 377

Problem Possible causes/consequences and M M Solutions
You can no longer lock or
unlock the vehicle using
KEYLESS-GO.
KEYLESS-GO has been deactivated.
X
Reactivate KEYLESS-GO (
Y
page 82).
The key battery is weak or discharged.
X
Check the key battery (
Y
page 84) and replace if necessary
(
Y
page 84).
If this does not work:
X
Lock or unlock the vehicle using the emergency key element
(
Y
page 89).
Interference from a powerful source of radio waves.
X
Lock or unlock the vehicle using the emergency key element
(
Y
page 89).
Fault with KEYLESS-GO.
X
Lock or unlock the vehicle using the remote control function of the
key.
X
Have the vehicle and key checked at a qualified specialist work-
shop.
If the vehicle cannot be locked or unlocked even using the remote
control function:
X
Lock or unlock the vehicle using the emergency key element
(
Y
page 89).
X
Have the vehicle and key checked at a qualified specialist work-
shop.
The engine cannot be
started using the key.
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 332).
or
X
Jump-start the vehicle (
Y
page 333).
or
X
Consult a qualified specialist workshop.
The engine cannot be
started using the Start/
Stop button. The key is in
the vehicle.
The vehicle is locked.
X
Unlock the vehicle and try to start the vehicle again.
The key battery is weak or discharged.
X
Check the key battery (
Y
page 84) and replace if necessary
(
Y
page 84).
If this does not work:
X
Start your vehicle with the key in the ignition lock.
Interference from a powerful source of radio waves.
X
Start your vehicle with the key in the ignition lock.
86
Key
Opening
and
closing