Bought the cls about two weeks ago and have been pleased with the performance etc. Had a health check done which revealed a faulty glowplug. Starting was a bit slow at first but since this cold snap it became much more reticent untl a few days ago it refused to fire at all. I plugged in a diagnostic code reader and it came up with a Glow plug module fault. Having read that these are a common problem I have purchased a new one along with a set of glowplugs. I set about the task of replacing the plugs yesterday and began with the nearside bank which I assumed would be the most difficult and hard to get to. No problem at all as the engine was as hot as possible and they came out relatively easy. My attention then turned to accessing the offside bank and horror of horrors found that the connector plugs were not fastened and the plug tops had been removed leaving only the thread and centre electrode. Please see photograph. I know that there are removal tools available with special drills etc but would they help to remove the remaining plugs? If not, how is it possible to drill an accurate hole in the plug with the centre electrode still present? Any help will be appreciated.