Wow, thanks for all the suggestions. I checked the fuse box, no issues. Then I pulled out the ashtray and frame unit and sure enough, there was enough build up of crud on the copper slider to prevent contact. I cleaned it up with some 600grit sandpaper and it looks like new again. Also cleaned the ashtray contact. Voila, connectivity has returned. THANKS to all.
BenzWorld.org forum is one of the largest Mercedes-Benz owner websites offering the most comprehensive collection of Mercedes-Benz information anywhere in the world. The site includes MB Forums, News, Galleries, Publications, Classifieds, Events and much more!