Mercedes-Benz E 2008 Series Owner's Manual page 306

mkalafa,
KEYLESS GO*
Problem
You cannot lock or unlock the
vehicle using the KEYLESS GO
key.
The battery check lamp in the
KEYLESS GO key does not light
up when tested.
* optional
Version: 2.9.4
Possible cause/consequence
The KEYLESS GO key batteries
are discharged or nearly dis-
charged.
There is a fault with KEYLESS GO.
There is interference from a pow-
erful source of radio waves.
The KEYLESS GO key batteries
are discharged.
Suggested solutions
Lock or unlock the vehicle using the remote control function of the
X
key. To do this, point the tip of the key at the driver's door handle
from close range and try to unlock or lock the vehicle again.
If this does not work:
Lock or unlock the vehicle using the emergency key element
X
( page 306).
Y
Check the KEYLESS GO key batteries (
X
them if necessary ( page 310).
Y
Lock or unlock the vehicle using the remote control function of the
X
key. To do this, point the tip of the key at the driver's door handle
from close range and try to open the vehicle again.
Have the KEYLESS GO key checked at a qualified specialist work-
X
shop.
Lock or unlock the vehicle using the emergency key element
X
( page 306).
Y
Change the batteries ( page 310).
X
Y
Practical advice
Troubleshooting
page 310) and replace
Y
303
Z