Problem
Possible causes/consequences and
M
M
Solutions
There is interference from a powerful source of radio waves.
X
Unlock (
Y
page 89) or lock (
Y
page 89) the vehicle using the
emergency key element.
There is a fault with KEYLESS-GO.
X
Lock/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/unlocked even using the remote con-
trol function:
X
Unlock (
Y
page 89) or lock (
Y
page 89) the vehicle using the
emergency key element.
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 353).
or
X
Jump-start the vehicle (
Y
page 354).
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 discharged or nearly discharged.
X
Check the key battery (
Y
page 84) and replace it if necessary
(
Y
page 84).
If this does not work:
X
Start your vehicle with the key in the ignition lock.
There is interference from a powerful source of radio waves.
X
Start your vehicle with the key in the ignition lock.
You have lost a key.
X
Have the key deactivated at a qualified specialist workshop.
X
Report the loss immediately to the vehicle insurers.
X
If necessary, have the locks changed as well.
You have lost the emer-
gency key element.
X
Report the loss immediately to the vehicle insurers.
X
If necessary, have the locks changed as well.
86
Key
Opening
and
closing