B6 S4 cranking issue - starter motor?

[keepinthedreamalive]

I would say engine to body earth strap poor connection.
Volt drop it by putting a volt meter across battery neg and then to the engine block and then crank should see no more than 0.5V, anything more than that indicates a poor earth. Right front chassis leg under airbox would be a good place to start.
Hope this helps

[ManiacuV6]

As far as I know the starter solenoid is powered by the electronic module that manages the lights of the car . So enter on VAG COM to 09-Centr. electronics and see there if something is wrong or not