Mercedes-Benz SLR McLaren. Operator's Manual.

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).
The electrohydraulic brake system is automatically
activated when you
unlock the vehicle with the SmartKey
open the driver’s or passenger door
turn the SmartKey in the starter switch
to position 1
depress the brake pedal
release the parking brake
i
If the electrohydraulic brake system is
activated as the brake pedal is first depressed,
you may feel a reduced pedal
resistance and longer pedal travel than
normal. When releasing the pedal, you
may also feel the brake pedal pulsate
and you may hear a sound which is
caused by the activation of the electrohydraulic
brake system pump. This is
normal and not an indication of a malfunction.
Pedal travel returns to normal
when you release the brake pedal and
the sound soon ceases.
If you experience the above while driving
and the red brake warning lamp
( page 300) illuminates and/or warning
messages appear in the multifunction
display ( page 319), the brake
system is malfunctioning. Follow the instructions
of the warning message(s)
and have the brake system checked
immediately.
Safety and Security
Driving safety systems
Warning! G
Have brake pad replacement and other work
on the electrohydraulic brake system carried
out by qualified technicians only. Contact
your Mercedes-Benz Center for further
information. The electrohydraulic brake system
must be deactivated prior to working on
the system. High pressure is intermittently
built up in the system as part of its automatic
self-test. In addition, the system is automatically
activated when the vehicle is
unlocked by remote control, when the driver
or passenger door is opened, when the
SmartKey in the starter switch is turned to
position 1, when the brake pedal is depressed
or when the parking brake is released.
Failure to deactivate the system
prior to maintenance will cause brake pistons
to extend and brake fluid to leak, which
may result in injuries (contusions and acid
burns). Extended brake pistons may also
cause injury.
85