how would it happen that one bolt on the sterring column of my 4-year-old E200 CDI could have fallen off and and the other had become loose? This discovered during a recent routine A3 service? regards ***** ***** London
thanks for your interesting answer. You tell me that Mercedes became aware in 2011 that bolts could come loose and as a precaution now routinely fit each bolt with chemical thread lock. So the fault in my car build 2010 could be due to the absence of thread lock. But you say, it could also be as a result of careless maintenance. However my additional question is: why would a mechanic tamper with the steering column bolts? Why should they need to touch the steering column at all even in the course of a major service? I 'm intrigued to hear your answer!