Rear Shocks Under Warranty or not?

[passat19tdi]

Hi All

My 2007 TDI Sport Saloon (approx 42000 miles) has had the injectors done under warranty at the local stealers, but then I noticed the dreaded rear tyres wearing uneavenly on the inner edge and reading the forum decided to try the rear wheel alignement at a local Auto care centre (not Thick Git) I was told that the alignment was not that far out (charged £40 for adjustment) and that the wear pattern suggested worn Shocks (quoted around £160 fitted for gas filled heavy duty), as others have said it sounds like a rear wheel bearing has worn out. I then drove a 2.0 FSI SEL in Greece for the past 14 days or so with no noise at all (2005 model I think with 70000 miles).
My question is how successful have you all been with getting this done under warranty (compared to the injectors), and if I do have to pay for the replacement any ideas on what to buy (eg Sachs from Euro Car Parts) and where to get fitted

Thanks!