Mercedes-Benz SLR McLaren. Operator's Manual.

Controls in detail
Driving systems
1 Sets current or higher speed
2 Sets current or lower speed
3 Cancels cruise control
4 Resumes at last set speed
Setting current speed
Accelerate or decelerate to the desired
speed.
Briefly lift 1 or depress 2 the cruise
control lever.
The current speed is set.
198
Remove your foot from the accelerator
pedal.
Cruise control is activated.
i
On uphill or downhill grades, cruise
control may not be able to maintain the
set speed. Once the grade eases, the
set speed will be resumed.
Canceling cruise control
There are several ways to cancel cruise
control:
Step on the brake pedal.
Cruise control is canceled. The last
speed set is stored for later use.
or
Briefly push the cruise control lever to
position 3.
Cruise control is canceled. The last
speed set is stored for later use.
The cruise control is automatically cancelled,
when
the vehicle speed is below 20 mph
(30 km/h)
ESP ® is in operation or switched off
with the ESP switch ( page 83)
you move the gear selector lever to
position N while driving
!
However, the gear selector lever
should not be moved to position N
while driving, except to coast when the
vehicle is in danger of skidding (e.g. on
icy roads).
i
Depressing the accelerator pedal does
not deactivate the cruise control. After
brief acceleration (e.g. for passing), the
cruise control will resume the last
speed set.
The last stored speed is canceled when
you turn off the engine.