Mercedes-Benz S-Class 2020 Operator's Manual page 213

% The segments between the stored speed and
the end of the segment display light up in
the speedometer.
System limits
Cruise control may be unable to maintain the
stored speed on uphill gradients. The stored
speed is resumed when the gradient evens out.
Change into a lower gear in good time on long
and steep downhill gradients. Take particular
note of this when driving a laden vehicle. By
doing so, you will make use of the engine's brak‐
ing effect. This relieves the load on the brake
system and prevents the brakes from overheat‐
ing and wearing too quickly.
Do not use cruise control in the following situa‐
tions:
In traffic situations which require frequent
R
changes of speed, e.g. in heavy traffic, on
winding roads.
On slippery roads. Accelerating can cause
R
the drive wheels to lose traction and the
vehicle could then skid.
If you are driving when visibility is poor.
R
Operating cruise control
& WARNING Risk of accident due to stored
speed
If you call up the stored speed and this is
lower than your current speed, the vehicle
decelerates.
Take into account the traffic situation
#
before calling up the stored speed.
Requirements:
®
R ESP must be activated, but not intervening.
The driven speed is at least 15 mph
R
(20 km/h).
The transmission is in position h.
R
Driving and parking 211
To activate cruise control: press rocker
#
switch 1 up.
To activate cruise control: press rocker
#
switch 2 up (SET+) or down (SET-).
The current speed is stored and maintained
by the vehicle.
or