Warranty still stands providing the symptoms of the fault (i.e. the fault) are still the same as the initial inception. They have not fixed it and it is an ongoing issue within a short timescale. They would not be obliged to fix anything NOT directly related though.

If they refuse, call CAB and they will most likely help you to write a nicely worded stinking letter to get the appropriate action taken. Contact the Customer Care Centre as well in the meantime though as they have the authority to overrule a service advisor/manager in these circumstances.

Once fixed, find another dealer to use as these ones obviously are not being that helpful.

I have an Audi dealer literally @ the end of my road and I take my A6 about 30 miles away for servicing as they are spot-on for quality and service, even when Audi themselves mess up. I had a towbar fitted when I got the car (3 month old ex-demo @ the time) and Audi messed something up on the spec of the car so the parts quoted were incorrect. Audi picked up the tab for the extra £250 worth of parts required immediately. My local dealer did not want to know.