first post on here usually on the bmw forums but fancy a change currently im running a 3 litre z4 but looking to sell it and get a mk5 gti was wandering what to look out for with regards any known faults so far all ive read is good things will definatley start tuning it possibly exhaust and re map what should i expect to pay. How much are vw services absolutley any advice is much appreciated. and finally anyone want a z4!!