Oil changes on my '93 190e 2.6 were never more than $35 at the dealership! I REALLY like Zimbrick European in Madison - they were very fair to me, and have competitve labor rates (at least I think so).
I'm wondering if services such as these are dictated largely by labor rates dependent upon where the service departments are located. For example, Zimbrick charges $85USD per hour in labor costs. I looked into service at Loeber Motors in Chicago and at Knauz in Lake Forest, and their rates were more like $130USD per hour. But then again, eveyrone in Lake Forest drives an MB and can surely afford it, so it's not a big deal!
-Michael.