Thanks for the info, guys. The light still comes on intermittently, so I'll try to get by the dealership later this week and buy a switch. Anyone know the part number offhand? I've seen it on these forums for the ML-class, but I don't remember seeing it for the E300TD. If nobody knows, I'll just harass the service guy into looking it up for me. Will be a weekend project to get under the dash and install it, I suppose...hope it fixes things!

Cheers, John