Hi Everyone, having recently bought a 2005 Clk500 m113 engine Ive noticed a bit of lifter/tappet noise on start up/first 5 minutes of driving. As I understand it this is fairly common with this series of engine. On some of the American forums people have been talking about a oil pipe (maybe plastic) the breaks or blocks and starves the lifters of oil? Does anyone know anymore about this or what it might cost to fix it? I see from an earlier post that there is a mercedes specialist in Portsmouth that seems to be quite active on this forum, he has talked about changing said pipe for customers. However I think he was making reference to r129 models and I'm not sure if the same applies to my car. Being the sort of chap I am I will definately change it as my car is going in for a service on the 24th and I don't like leaving anything to chance. You help and advice is much appreciated, thanks in advance.