Trailer 219 Avoid inhaling ammonia vapours. Only fill the AdBlue ® tank in well-ventilated areas. AdBlue ® should not come into contact with skin, eyes or clothing, and should not be swal- lowed. Keep AdBlue ® out of the reach of chil- dren. If you come into contact with AdBlue ® , observe the following: R immediately wash AdBlue ® from your skin with water and soap. Driving mode R if AdBlue ® comes into contact with your eyes, rinse your eyes with clean water immediately. Consult a doctor without delay. If AdBlue ® tank = still contains sufficient AdBlue ® , pressure compensation may result when unscrewing cap : . AdBlue ® may spill out. For this reason, take care when unscrew- ing cap :
from AdBlue ® tank = . If AdBlue ® spills out, immediately wash the affected area with plenty of water. A special tank filler neck prevents AdBlue ® tank = from mistakenly being filled with die- sel fuel. Example: AdBlue ® U 218 tank R if you have swallowed AdBlue ® , immedi- ately rinse your mouth with water and drink plenty of water. Consult a doctor without delay. R change clothing that is soiled with AdBlue ® immediately. AdBlue ® is not refilled as part of the mainte- nance work. Top up the tank regularly during vehicle operation or at the latest when the first event message is displayed on the on- board computer.
Additional information on AdBlue ® is included in the "Service products" section ( Y page 365). X Switch off the engine. X Remove the key from the ignition lock. X Switch off the auxiliary heating ( Y page 102). X Apply the parking brake. X Lockable cap: lift up lock cover ; on blue cap : . Before filling the tank X Unlock blue cap : with the separate key. X All vehicles: slowly turn blue cap : to the left and remove. Trailer Trailer tow hitch The trailer coupling is one of the vehicle com- ponents with particular significance for road safety. Please comply precisely with the man- ufacturer’s operating, care and maintenance instructions. Only tow vehicles that do not have technical problems.
The permitted weight and load val- ues that must not be exceeded are to be Example: AdBlue ® U 318 tank Z