Starter issues...

Here is the offending article:




The pinion was already chewed off a bit, as the magnet switch didn't work properly and the axis was free to move in both directions!
Also, there is a coolant leak, as you can see the green drops...
I already checked and think it is the valve for the heater, it looks like there is a leak somewhere.
I need to check the details, but instead of the +100€ spare from Porsche, the exact same part is available from Mercedes for a fracture of that!