See also:

Dashboard fuse box
Do not use a pointed object such as a screwdriver to open the cover in the dashboard. You could damage the dashboard or the cover. – To open: pull cover 1 outwards in the direction of ...

Charging the battery
WARNING Never charge a battery still installed in the vehicle unless a battery charger unit approved by Mercedes-Benz is being used. Gases may escape during charging and cause explosions th ...

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 ...