See also:

Removing the towing eye
– Loosen the towing eye and unscrew it. – Attach cover 1 or 2 to the bumper and press until it engages. – Place the towing eye in the vehicle tool kit. ...

Making adjustments in 1 mph (Canada:

1 km/h) increments
Briefly press the cruise control lever to the pressure point, up 1 for a higher speed or down 2 for a lower speed. The last speed stored is increased or reduced. ...

Trailer power supply
The trailer power socket of your vehicle is designed for connecting the 7-pin connector supplied as part of the Mercedes-Benzapproved trailer coupling. Depending on your trailer, you may need an ...