Hello all!, can anyone give a definitive answer on this engine in the S 500 and CLS 550 earlier models 2005 - 2008, i've used the search facility on here with regards to the Idler gear issues with the early M273 engine, most answers link back to the website MB medic, there is a list published on there with the models affected but the two models I mention aren't on there, despite reading other reviews stating that they could be affected??, I only want to know as both models are included in my current shortlist along with the CLS 500(M113). I suppose I could simply ring MB for VIN numbers and check against the engine serial numbers, but would be easier if I knew this was one issue NOT to worry about when looking!!, thanks in anticipation for any tips and advice and apologies if i've failed to pick up on a glaringly obvious post somewhere on here.( it is early on a Sunday and i had a few last night...LOL!!)