High outside temperatures
If DEF heats up to over 122 °F (50 °C) for extended periods, e.g. as a result of direct sunlight on the DEF reservoir, DEF can decompose. Ammonia vapors develop as a result.
WARNING
When opening the filler cap of the DEF tank
ammonia gas vapors may escape. Refill DEF
in a well ventilated area only. Ammonia gas
vapors have a pungent odor and are
particularly irritating for your skin, mucous
membranes, and eyes. Inhaling ammonia gas
vapors will cause burning eyes, nose, and
throat, as well as coughing and watering eyes.
See also:
Important safety notes
WARNING
When opening or closing the door windows,
make sure that there is no danger of anyone
being harmed by the opening/closing
procedure.
The door windows are equipped with
automatic op ...
State-of-the-art engine technology from the inventor of the diesel passenger
car
The 2.2-litre CDI engine turns the ML 250 BlueTEC 4MATIC into the most
economical SUV in its class. With NEDC fuel consumption of 6.0 l/100 km, the
model even outperforms any hybrid model currentl ...
Driving safety systems overview
In this section, you will find information about
the following driving safety systems:
- ABS (Anti-lock Braking System)
- BAS (Brake Assist System)
- BAS PLUS (Brake Assist System Plus*) ...