See also:

Making adjustments in 5 mph (Canada: 10 km/h) increments
Briefly press the cruise control lever beyond the pressure point, up 1 for a higher speed or down 2 for a lower speed. The last speed stored is increased or reduced. ...

Please bear the following in mind
Resetting the service interval display A qualified specialist workshop, e.g. an authorized Mercedes-Benz Center, will reset the service interval display after the necessary service work has bee ...

Switching the automatic locking feature on/off
You can use this function to activate or deactivate the automatic central locking feature. If the automatic locking feature is activated, your vehicle will lock centrally from a speed of appro ...