Our A4 Avant 1.8 tfsi suddenly ran rough could only achieve 20mph. RAC tried a coil which made no difference. Got towed to local garage who diagnosed a stuck valve. They say it will cost 6 or7 hours labour to strip the engine down to get to the valve and we would be better to pay them to put a recon engine in!? Not being mechanically minded is this a sledge hammer to crack a nut or really would fixing a bent or stuck valve cost more to repair than an engine swap.
Anyone else had this experience? Should I go to my audi main dealer and risk their coasts?