Downhill gradients
On long and steep gradients, you must reduce the load on the brakes by shifting
early to a lower gear. This allows you to take advantage of the engine braking effect
and helps avoid overheating and excessive wear of the brakes.
When you take advantage of the engine braking effect, a drive wheel may not turn for some time, e.g. on a slippery road surface. This could cause damage to the drive train. This type of damage is not covered by the Mercedes-Benz warranty.
See also:
Kickdown
Kickdown is not possible in manual drive
program M. ...
Safety & Features
As of this writing, neither the National Highway Traffic Safety
Administration nor the Insurance Institute for Highway Safety has tested the
E-Class wagon. (IIHS has tested the E-Class sedan, but ...
The first 1000 miles (1500 km)
The more you look after the engine when it is new, the more satisfied you will
be with its performance in the future.
Drive at varying vehicle speeds and engine speeds for the first 1000 miles
...