This is the 155th complaint received against the 2009-2012 Golf Mk VI. EGR failures are much more common on 1.6 TDIs than on 2.0 TDIs. Your repeated failures make me wonder how you have been running the car and what you have been running the car on (this may be why goodwill was turned down). However, you could argue that the engine in inherently dirty and that is why it has been clogging its EGRs so regularly. You could expect this in normal running after about 80,000 miles anyway.