Mercedes-Benz R-Class 2009 Owners Manual - Manual (Page 166)

Driving systems
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brake pedal depresses automatically when
the cruise control engages the brakes.
Keep the driver’s footwell clear at all times,
including the area under the brake pedal.
Objects stored in this area may impair
pedal movement which could interfere with
the braking ability of the cruise control
system.
Do not place your foot under the brake
pedal – your foot could become caught.
1 Setting current or higher speed
2 Setting current or lower speed
3 Canceling the cruise control
4 Activating the cruise control or resuming
to last set speed
Activating cruise control
You can activate the cruise control at a
vehicle speed above 20 mph (30 km/h).
You cannot activate the cruise control:
R when you brake
R when you have engaged the parking brake
R when the automatic transmission is in park
position
P, reverse gear R, or neutral
position N
R the ESP ® is switched off or has switched off
due to a malfunction
The vehicle speed displayed in the
speedometer can briefly vary from the speed
setting for the cruise control system.
Setting current speed
X Accelerate or decelerate to the desired
speed.
X Briefly lift the cruise control lever in
direction of arrow
1 or press in direction
of arrow 2 .
X Remove your foot from the accelerator
pedal.
i On uphill grades, the cruise control may
not be able to maintain the set speed. Once
the grade eases, the set speed will be
resumed.
On downhill grades, the cruise control
maintains the set speed by braking with the
vehicle’s brake system. In addition, on
longer downhill grades the automatic
transmission will downshift automatically.
Canceling cruise control
X Depress the brake pedal.
or
X Briefly push the cruise control lever in
direction of arrow
3 .
The last set speed is stored for later use.
The last stored speed is deleted from memory
when the engine is turned off.
The cruise control switches off automatically
when you depress the brake pedal or you
engage the parking brake.
The cruise control switches off automatically
and an acoustic warning will sound when
R the vehicle speed falls below 20 mph
(30 km/h)
R the ESP ® is in operation
R the ESP ® is switched off with the ESP ®
switch
Controls in detail