No resolution yet, and most of the work I had planned on getting done last week didn't happen... it all hinged on getting new tires, and I was just able to track down the ones I need over the weekend. Anyways, provided I can procure a fuel filter tomorrow, I'm going to have it changed by Mercedes on Wednesday when I get my oil/coolant/brake fluid changed. I most likely will have the fuel service done at Firestone when I have the tires installed either at the end of this week or next week