Mercedes-Benz CLK-Class Owner's Manual page 211

Controls in detail
Driving systems
G
Risk of accident
If there is a change of drivers, advise the
new driver of the stored speed limit.
Only use variable Speedtronic if you are sure
that you will not have to accelerate suddenly
to a speed above that stored as the speed
limit. You could otherwise cause an acci-
dent.
It is only possible to exceed the stored limit
speed if you deactivate variable Speed-
tronic, e.g. by depressing the accelerator
pedal beyond the pressure point (kickdown).
208
G
Risk of injury
CLK 500:
Speedtronic brakes the vehicle automati-
cally to prevent the set speed from being
exceeded. When this happens, the brake
pedal is depressed.
Do not place your foot under the brake pedal
as it could be trapped.
Storing the current speed
1 To store the speed
2 To store the speed
Press the cruise control lever briefly in
the direction of arrow 1.
The current speed is stored.
All models except CLK 500:
Speedtronic rounds the speed up to
the next multiple of 10 km/h.