The wear patterns on the front and rear wheels differ:
On vehicles that have the same size front and rear wheels, rotate the wheels according to the intervals in the tire manufacturer's warranty book in your vehicle documents. If this is not available, rotate the tires every 3,000 to 6,000 miles (5,000 to 10,000 km), depending on the wear. Ensure that the direction of rotation is maintained. It is imperative to observe the instructions and safety notes on "Changing a wheel" when doing so Preparing the vehicle for a wheel change. Notes on storing wheels When storing wheels, observe the following notes:
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Mercedes Benz C-Class (W204) 2007 - 2014 Training Manual > Electrical System: Signal Acquisition and Actuation Module (SAM)
Front SAM The front SAM/SRB control unit (N10/1) is installed in the engine compartment in the driver-side control unit box. The most important functions are: Control of the front exterior lights Master of the turn signal function Control of the cornering illumination Rain closing of the tilting/sli ...