fan comes on when ignition is on, stops when ignition is turned off

Instructions on how to replace the suction fan on a 2005 c320 4matic, and are there any known problems with this?

Power was off. Now no power to motor??? Fuse is OK.

reservoir. tires are correct size

Is it safe todrive car?

Valves are tapping badly

Directional lights on the outside of the car work properly. But the directional lights in the inside of car are always on--steady light--even when car is turned off. Lights have been constantly on for last 4 months. Also change in directional lights on the outside are not noted on the inside--lights constantly on.

Arm rest on front passenger door broken. How do I disassemble the door to replace the arm rest?