I'm just about to start seriously looking for a Z4 to buy, I've looked around the forum but can't seem to find a buyers guide - is there one hidden away somewhere? If not is there anywhere I can find one? I know my way around cars pretty well and have owned BMWs in the past (I have a BMW bike as well) but it would be nice to know specific things to look out for that could be potential problems on the Z4. Any help will be greatly appreciated 
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