Mercedes-Benz SLR McLaren. Operator's Manual.

Practical hints
What to do if ...
Left display Right display Possible cause/
consequence
; (USA only)
3 (Canada only)
320
Reduced
brake effect
Visit workshop
Increased
stopping distance
Visit workshop
Warning! G
Driving while these messages are displayed
can result in an accident. Have your brake
system checked immediately.
If there is a malfunction in the electrohydraulic
brake system, we recommend that
the vehicle be transported with all wheels
off the ground using flatbed or appropriate
wheel lift/dolly equipment.
The electrohydraulic
brake system is in emergency
operation mode.
Considerably greater
brake pedal force is required
and the pedal
travel is longer. The stopping
distance is increased.
Possible solution
A tow bar must be used if circumstances do
not permit the use of the recommended
towing methods and the vehicle requires
towing with all four wheels on the ground.
Towing the vehicle with all four wheels on
the ground is only permissible for distances
up to 30 miles (50 km) and at a speed not to
exceed 30 mph (50 km/h). For more information,
see “Towing the vehicle”
( page 360).
Continue driving with added caution.
Visit an authorized Mercedes-Benz Center immediately.
Adjust driving to be consistent with reduced
braking responsiveness.
Failure to follow these instructions increases the risk of
an accident.
If the electrohydraulic brake system enters
its emergency operation mode, the driver
must apply significantly greater brake pedal
pressure and depress the pedal much further
than normal to obtain braking effect.
If necessary, apply full pressure to the brake
pedal. Stopping distance is increased!