Lindasue, MB dealers can normally get genuine MB parts overnight ... if they can't then an independent won't be able to either. I'd say they were trying to avoid your business because they lack qualified techs who know how to service the older models. Even if the MB dealer had to wait for parts it's not costing you money ... they don't start a meter and bill for the elapsed time the car is there ... lame excuse.

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Fred Hoelzle