Mercedes-Benz 2006 R 350 Operator's Manual page 441

Practical hints
What to do if ...
Display symbol Display messages
F
Key
not recognized
Key
not recognized
440
Possible cause/consequence Possible solution
The SmartKey with
KEYLESS-GO* is not recognized
while the engine is running
because
the SmartKey with
KEYLESS-GO* is not in the
vehicle
there is strong
radio-frequency interference
The SmartKey with
KEYLESS-GO* is momentarily
not recognized.
The SmartKey with
KEYLESS-GO* is not recognized
while the ignition is switched on
( page 38) and a door is
opened or closed and
the SmartKey with
KEYLESS-GO* is not in the
vehicle
Stop the vehicle as soon as it is safe to do
so.
Search for the SmartKey with
KEYLESS-GO*.
Otherwise the vehicle cannot be centrally
locked nor can the engine be started
again after the engine is stopped.
Change the position of the SmartKey with
KEYLESS-GO* in the vehicle.
Operate the vehicle with the SmartKey in
the starter switch if necessary.
Search for the SmartKey with
KEYLESS-GO*.
Otherwise the vehicle cannot be locked
nor can the engine be started.
Change the position of the SmartKey with
KEYLESS-GO* in the vehicle.