got up at 8am to fill it with petrol and when I started it up it sounded very wrong, loud clattering in the engine & really rough, like a lawn mower and it drove with a total lack of power. there was an emissions light on the dash board so checked the manual and called audi assistance as it advised from the manual to be seen by audi for diagnosis.
RAC person arrives, first question, is this a diesel or petrol RS4! great start, eventually he say that he thinks it a problem with the valves and the oil was on minimum (no warning light on dash and apparently they put several litres of oil in at service).
Had to be taken in on the back of a wagon so called another person to do this who told me several times that Audis get lots of faults and he is on first name terms with the people at preston audi because he takes in audis all the time. Great training in how to talk to a pissed off / concerned car owner, obviously thats exactly what i wanted to hear at this time in the morning. was actually meant to be driving to Bedford for a wedding so had to cancel those plans...
got a hire car (vauxhall insignia) which is really marked / damaged and the guy got me to check it over and I pointed out 6-7 more marks on it than he had already noted down.
Overall, top quality service from audi assist.... sorry I mean the RAC. I didnt see any audi gimps today, obviously the RS4 isnt a special enough audi to warrant a f***ing audi roadside technician!!!
at least its under warranty until July (which even at £1600 I think I will be extending now for piece of mind). Its not had any mechanical problems in the last 9 months or so of ownership. so if the engine is totally screwed they can replace it, or stick the R8 V10 unit in so it develops enough power!
Ok, rant over..

