So I recently bought a CL500 without knowing any of the related issues to look out for such as the ABC system, the car looked and felt great so I bought it but after driving for several days I heard the computer beep at me after hitting bumps but nothing was ever displayed on the dash or at least it was that quick that by the time I looked it was gone until one day I happened to look at the dash at the same time as I hit a bump and saw ABC drive carefully displayed in red for a split second. Anyway I took the car to my local official Mercedes garage expecting they would be the best to diagnose the fault?? the next day they phoned me after completing a full check of the car and told me that the suspension is in perfect working order but the car needed a brake caliper so I told them to fix it for me ( £944 ) after the weekend I picked up the car and drove it home and noticed the same issue it went in with! naturally I was a bit ****** off and took the car back... A couple of days later I was told that it needed a new ABC / power steering pump and it would cost £1900 after getting a lift up there and expressing my disappointment with the original diagnosis a day later I managed to knock this price down to £1200 and was told it would be ready the following day. 4 days later I am phoned and told they have replaced the pump and the problem is still there!! So personally I feel that I shoudn`t pay for the pump as it would appear that there was nothing wrong with the original? another day has passed now and have not been informed of the progress and whether it has been fixed! If anyone has any ideas on here on what the issue may be? perhaps I can tell Mercedes what the issue is! All together I am not a happy bunny and will be going down there today to express my thoughts in no uncertain terms and will expect not to pay for the unnecessary work carried out, after all this is MERCEDES and not some back street garage? Rant over... Any ideas will be greatly received.