Hi, I am Donnie, you spoke to me on the phone yesterday. We are located in Duluth, Ga. You should call me again before she runs by and I'll be glad to help. IF I can't reset it with the standard method, I will connect my tester to it and do it there.
The shop you are coming to is in NO WAY affiliated with MercedesShop. I started Mercedesshop and Bill and I are building the new shop in the Suwanee/Sugar Hill area. The name of it is MB Autowerks. You can see the progress at http://www.MBAutowerks.com.