218 Refuelling not allow fuels to run into the sewage system, the surface waters, the ground water or into the ground. X Replace fuel filler cap = and screw it on. X Lock fuel filler cap = with the key. X Vehicles with fuel prefilter with water separator: drain the fuel prefilter regularly ( Y page 321). Do not get into the vehicle again during the refuelling process. Otherwise, electrostatic charge could build up again. If you overfill the fuel tank, some fuel may spray out when you remove the fuel pump nozzle. You will find further information on fuel in the "Service products" section ( Y page 364). AdBlue ® Driving mode Important safety notes !
Do not allow diesel fuel to run into the AdBlue ® tank. You could otherwise damage the exhaust gas aftertreatment system. Refuelling ! Only use AdBlue ® /DEF in accordance with DIN 70070/ISO 22241. Do not use any additives. If AdBlue ® /DEF comes into contact with painted or aluminium surfaces when filling the tank, rinse the affected area immedi- ately with plenty of water. ! Do not mix additives to AdBlue ® . Do not thin AdBlue ® with tap water. This could destroy the exhaust gas aftertreatment system. Example: U 318 fuel tank X Switch off the engine. ! Always close the AdBlue ® tank properly. Otherwise impurities may get into the exhaust gas aftertreatment system and damage it.
X Remove the key from the ignition lock. X Switch off the auxiliary heating ( Y page 102). X Apply the parking brake. ! Make sure that you do not overfill the AdBlue ® /DEF tank. Otherwise, the AdBlue ® /DEF tank could be damaged at very low temperatures. X Raise lock cover ; slightly and move it to the side. X Turn fuel filler cap = to the left and remove from fuel tank : . X Unlock fuel filler cap = with the key. When opening the AdBlue ® tank, small amounts of ammonia vapours could escape. Ammonia vapours have a pungent smell and are particularly irritating to: X Completely insert the filler neck of the fuel pump nozzle into the tank, hook in place and refuel.
X Observe the fuel grade ( Y page 364). R skin X Only fill the tank until the pump nozzle switches off. i Do not add any more fuel after the pump stops filling for the first time. Otherwise, fuel may leak out. R eyes The vapours may cause a burning sensation in the eyes, nose and throat as well as irritation of the throat and watering eyes. R mucous membranes