Closing the DEF filler cap and fuel filler flap

Mercedes-Benz M-Class / Mercedes-Benz M-Class Owners Manual / Driving and parking / Refueling / DEF / Closing the DEF filler cap and fuel filler flap

– Place DEF filler cap 2 on the filler neck and

– Place DEF filler cap 2 on the filler neck and turn it clockwise.
– To close the fuel filler flap, press it in the direction of arrow 1.
– Drive at a speed above 10 mph (16 km/h).
The Check Additive See Operator's Manual message disappears after approximately one minute.

If the Check Additive See If the Check Additive See Operator's Manual message continues to be shown in the multifunction display, you need to add more DEF.

    See also:

    Checklist before driving off-road
    – Engine oil level: check the engine oil and add oil if necessary. When driving on steep gradients, the oil level must be sufficiently high to ensure a correct oil supply in the vehicle. – DEF ...

    Important safety notes
    Cruise control maintains a constant road speed for you. It brakes automatically in order to avoid exceeding the set speed. On long and steep downhill gradients, especially if the vehicle is la ...

    Cleaning the paintwork
    Scratches, corrosive deposits, areas affected by corrosion and damage caused by inadequate care cannot always be completely repaired. In such cases, visit a qualified specialist workshop, e.g. ...