Mercedes-Benz M-Class Owners Manual
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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 o ...
Maintenance
The Service and Warranty Booklet describes
all the necessary maintenance work which
should be done at regular intervals.
Always have the Service and Warranty
Booklet with you when you bring the ...
Clearing the memory of the integrated garage door opener on the rear-view
mirror
Turn the SmartKey to position 2
in the
ignition lock.
Press transmitter buttons 2 and
4.
The indicator lamp lights up yellow.
Press and hold transmitter buttons
2
and 4 until the indic ...
