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.

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