I might be worth taking it to VW as I had a fault last year with my ABS pump which they fixed under warrantee, the guy in the service centre said that there was lots of them and it's a widely known issue!
// I've just looked through my paperwork for the car, ans all I've got is a sheet to say that a brake pressure sensor was changed. Although, at the time, the service guy said it was reading 200Bar all the time, and it needs the ABS pump removing to get to the sensor, as well as all the brakes bleeding again to do the job.
Definitely ring them and ask.