Mercedes-Benz R-Class Owner's Manual page 299

Practical advice
Troubleshooting
Key
Problem
You cannot lock or unlock the
vehicle using the key.
The battery charge indicator lamp
of the key does not go on during
the test.
You have lost a key.
You have lost the emergency key
element.
296
Possible cause/consequence
The key batteries are discharged
or nearly discharged.
The key is faulty.
The key batteries are discharged.
Suggested solutions
Point the tip of the key at the driver's door handle from close range
X
and try to unlock or lock the vehicle again.
If this does not work:
Unlock the vehicle using the emergency key element
X
( page 302).
Y
Check the key batteries ( page 305) and replace them if neces-
X
Y
sary ( page 305).
Y
Unlock the vehicle using the emergency key element
X
( page 302).
Y
Have the key checked at a qualified specialist workshop.
X
Change the batteries ( page 305).
X
Y
Have the key cancelled at a Mercedes-Benz Service Centre.
X
Report the loss immediately to the vehicle insurers.
X
If necessary, have the manual locks changed too.
X
Report the loss immediately to the vehicle insurers.
X
If necessary, have the manual locks changed too.
X