Problem
Possible causes/consequences and
M
M
Solutions
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 can also not be locked/unlocked using the remote con-
trol function:
X
Lock (
Y
page 80) or unlock (
Y
page 80) the vehicle using the
emergency key element.
X
Have the vehicle and key checked at a qualified specialist work-
shop.
The drive system 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 drive system again.
If this does not work:
X
Check the 12 V battery and charge it if necessary (
Y
page 256).
or
X
Check the high-voltage battery and charge it if necessary
(
Y
page 135).
or
X
Jump-start the vehicle (
Y
page 258).
or
X
Consult a qualified specialist workshop.
The drive system 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 74) and replace it if necessary
(
Y
page 75).
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.
Key
77
Opening
and
closing
Z
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