Hi. I recently bought a 2000 w220 s600, which worked perfectly on the test drive but developed a misfire on the way home. I am trying to sort the misfire out now in conjunction with my local performance centre, and so far I have changed the MAF and the plugs. Its made the car run a little better, but it still starts to misfire when it is ticking over and has very little power over 4000 revs. I realise that the next thing to change will be one of the coil packs, i have a basic OBD2 reader which leads me to believe that its the first three plugs on the left bank as you are looking at the engine from the front. Thing is, as this is an 11 year old car, I am not too keen on paying MB dealer money for a new coil pack. So, what I wanted to ask is, do any of you know of a firm in the UK that refurbishes these coil packs? I cant seem to find one on the internet, but I cant believe that after reading how often these things die and knowing how expensive they are that no one repairs them. If not, then does anyone know of anywhere that could sell me a used one? I know its not the best idea to have used ones, but needs must and all that. Thanks for any help.