Mercedes-Benz 300 SL Operator's Manual page 84

Note:
If the engine does not brake the vehicle
sufficiently while driving on a
downgrade, the speed you set on the
cruise control may be exceeded and
you may have to step on the brake
pedal to slow down. As soon as the
grade eases, the cruise controlled speed
will again be maintained as long as the
brakes were not previously applied, or
the lever may be used to resume the
previously set speed if the brakes were
applied.
Warning!
Only use the cruise control if the
traffic and weather conditions make
it advisable to travel at a steady
speed.
• The use of cruise control
can be dangerous on winding
roads or in heavy traffic
because conditions do not
allow safe driving at a
steady speed.
• The use of cruise control
can be dangerous on slippery
roads. Rapid changes
in tire adhesion can result
in wheel spin and loss of
control.
The "Resume" function should only
be operated if the driver is fully
aware of the previously set speed and
wishes to resume this particular
preset speed.
Caution!
In the case of manual transmissions,
the vehicle maximum speed in the
individual gears should not be
exceeded. See line markings on the
speedometer. In the case of automatic
transmissions, the selector lever must
not be shifted to position "N" when
driving with cruise control engaged as
otherwise the engine will overrev,
possibly causing serious engine
damage.
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