I forgot to mention that I came to the shop at 1pm to approve the job and at 3pm got a call from them saying the car was ready for pick-up. So there was no way that 4 hours have been working on the car, unless 2 hours were spent on finding the cause of the defect.

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1996 E320 since 1/16/08, 171K miles as of Feb 2011

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1989 300CE - R.I.P. Dec 29 2007
Other MBs (sold): 1992 300E-24 - 1979 350SLC - 1984 230E - 1990 300CE