Mercedes-Benz R-Class
Mercedes-Benz R-Class

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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 ...
Notes on the Operator's Manual
This Operator's Manual contains a great deal
of helpful information. We urge you to read it
carefully and familiarize yourself with the
vehicle before driving.
For your own safety and longer se ...
Changing the battery
You require a CR 2025 3 V cell battery.
- Take the mechanical key out of the
SmartKey.
- Press mechanical key 2 into the opening
in the SmartKey in the direction of the
arrow until battery t ...
