Problems with the key
Problem
Possible causes/consequences and
M
M
Solutions
It is no longer possible to
lock the vehicle using the
key.
Possible causes:
R
The doors are not closed properly.
#
Close the doors properly and lock the vehicle again.
The turn signal lamps do
not flash when the vehi‐
cle is locked.
Possible causes:
R
The central locking system has malfunctioned.
#
Lock the vehicle using the emergency key (
/
page 43) or press
down the safety pins and then close the doors.
#
Have the locking system checked at a qualified specialist workshop.
It is no longer possible to
lock or unlock the vehicle
using the key.
Possible causes:
R
The key battery is weak or discharged.
R
The key is faulty.
#
Point the tip of the key at the driver's door handle from very close
range and press the
%
or
&
button.
If this does not work:
#
Replace the key battery (
/
page 43).
or
#
Use the emergency key to unlock and lock the vehicle (
/
page 43).
#
Have the key checked at a qualified specialist workshop.
The engine cannot be
started using the key.
Possible causes:
R
The on-board electrical system voltage is too low.
#
Switch off all non-essential consumers, such as interior lighting, and
try to start the engine again.
If this does not work:
#
Check the starter battery and charge it, if necessary (
/
page 191).
or
#
Jump-start the vehicle (
/
page 191).
or
#
Consult a qualified specialist workshop.
You have lost a key.
#
Have the key deactivated at a qualified specialist workshop.
#
If necessary, have the mechanical locks replaced.
You have lost the emer‐
gency key.
#
Report the loss immediately to the vehicle insurers.
#
If necessary, have the mechanical locks replaced.
44 Opening and closing
