Same issue can plague VW's.....
Need to replace the starter. I'm doing mine in the next few weeks when I have a few hours to do so.
FWIW, PelicanParts has a good deal on rebuilt starters.
Pelican Parts - European Automotive Parts and Accessories - Porsche • BMW • Mercedes • Volkswagen • Audi • Saab • Volvo • MINI
Note that one of them is for a manual transmission...274.50, while the other, cheaper one is for an automatic transmission...228.00.
Still beats a new one that costs 1100.00
Mike