Mercedes-Benz S-Class 2011 Operator's Manual page 394

Display messages
392
Display messages Possible causes/consequences and M Solutions
The yellow F (USA only)/ ! (Canada only) warning lamp
lights up. The red F (USA only)/ ! (Canada only) indicator
lamp flashes for approximately 10 seconds after the electric
parking brake has been applied or released. It then goes out or
remains lit.
The electric parking brake is malfunctioning, e.g. because of over
or undervoltage.
X
Pull away carefully.
X
Visit a qualified specialist workshop.
In the event of over or undervoltage:
X
Remove the cause for the over or undervoltage, e.g. by charging
the battery or restarting the engine.
X
Switch the ignition off and on, and then apply or release the
electric parking brake.
If this does not release the electric parking brake:
X
Do not drive on.
X
Consult a qualified specialist workshop.
The yellow F (USA only)/ ! (Canada only) warning lamp
lights up. The red F (USA only)/ ! (Canada only) indicator
lamp flashes for approximately 10 seconds after the electric
parking brake has been applied or released. It then goes out or
remains lit.
The electric parking brake has overheated.
X
Allow the vehicle to cool down. Do not apply or release the
electric parking brake during this time.
X
Use the folding wheel chock (
kit to secure the vehicle against rolling away.
X
When the vehicle has cooled down: switch the ignition off and
on again, then apply or release the electric parking brake.
Y page 464) from the vehicle tool