Cruise control is selected.
The parking brake has been released.
ESP® is activated, but may not intervene.
The driving speed is at least 30 km/h.
The clutch pedal is not depressed.
The brake pedal is not depressed.
The vehicle has been started.
The variable limiter is selected.
. LIM indicator lamp
off: cruise control is selected. LIM indicator lamp
lit: the variable limiter is selected.
or down 
. The current speed is stored and the vehicle maintains this speed (cruise control) or does not exceed it (variable limiter).
When you activate cruise control, the stored speed is briefly shown in the text field of the multifunction display. The multifunction display also shows the 
symbol and the stored speed.
When you activate the variable limiter, the multifunction display briefly shows the stored speed. The multifunction display also shows the 
symbol and the stored speed.
For vehicles with Active Distance Assist DISTRONIC, the segments between the start of the scale and the stored speed light up in the speedometer dial instead.
If you call up the stored speed and this is lower than your current speed, the vehicle decelerates.
. The last stored speed is called up and the vehicle maintains this speed (cruise control) or does not exceed it (variable limiter).
If the last stored speed has previously been deleted, the currently driven speed is stored.
When you switch off the vehicle, the last speed stored is cleared.
or down as far as the 1st pressure point. The stored speed is increased or reduced by 1 km/h.
or down beyond the 1st pressure point. The stored speed is increased or reduced by 10 km/h.
If you have set Miles as the unit for the digital speedometer, you can maintain any speed from 20 mph (cruise control) or set it as the limit speed (variable limiter). You can then set the limit speed in increments of 1 mph and 5 mph.
. . The or symbol and the stored speed in the multifunction display then go out.
you apply the brakes.
you drive below a speed of 30 km/h.
you shift the transmission to position
. ESP® intervenes.
In these cases the variable limiter remains activated.
If you deactivate ESP®, or ABS or ESP® is malfunctioning, cruise control and the limiter are deactivated.
Vehicles with manual transmission: if the engine speed is very low, cruise control or the limiter is deactivated. When the transmission is in neutral or the clutch pedal is depressed for longer than six seconds, cruise control is deactivated.
If cruise control automatically deactivates, a warning tone sounds and the Cruise control off message appears briefly in the multifunction display.