See also:

Storing wheels
Store wheels that are not being used in a cool, dry and preferably dark place. Protect the tires from oil, grease, gasoline and diesel. ...

Problems with the engine
...

Complete safety package for maximum occupant protection
In combination with the front and rear deformation zones, the Mercedes-Benz GLK-Class's highstrength passenger cell provides a highly efficient foundation for the occupant protection systems. Thes ...