Hello People, I have had my wonderful A4 1.8t Cabriolet for just over a year and loved every minute of it. Apart from the usual service bits and bobs it has cost me nothing. However, since I have owned the car there has been a slight oil/fuel leak (Not sure as it looks like it is coming from injectors) that has manifested at the top of the engine. I have had no adverse effects apart from my engine being dirty!! Just wondering if you guys know what part I need to replace or whether it is a common fault and I should leave it alone....Just want a clean bay! I will be performing a few service bits this weekend and wanted to get this done too. Is it a simple O-ring replacement that is an easy DIY? Thanks a bunch!