See also:

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 ...

Underinflated tires
WARNING Follow recommended tire inflation pressures. Do not underinflate tires. Underinflated tires wear excessively and/or unevenly, adversely affect handling and fuel economy, and are mo ...

2009 Mercedes-Benz R-Class Review
The last time I was in a Mercedes-Benz diesel I was 9 years old. My mom drove one. From inside my school classroom, I could hear her driving up the road; I could smell it from across the street. I ...