Mercedes-Benz 2009 CL-Class Operator's Manual page 514

Practical hints
Vehicle status messages in the multifunction display
Display messages
Remove 'Start'
Button
and Insert Key
Obtain
a New Key
Key Does Not
Belong to Vehicle
Check
Washer Fluid
512
Possible cause/consequence
The KEYLESS-GO system is
malfunctioning.
The SmartKey with KEYLESS-GO must be
replaced.
The SmartKey or SmartKey with KEYLESS-
GO in the starter switch does not belong
to the vehicle.
The water level has dropped to approx.
1.1 US qts (1.0 l).
Possible solution
X
Remove KEYLESS-GO button from the starter
switch ( Y page 302).
X
Operate the vehicle with the SmartKey in the
starter switch.
X
Contact an authorized Mercedes-Benz Center
as soon as possible.
X
Remove the SmartKey from the starter switch.
X
Add washer fluid ( Y page 428).