I Called PAD about a chip for a '94 E420. They really didn't have a lot of info (specs, plug-in type, etc.) and said they had to "order" it. When I asked who they ordered them from, I was told "Superchips". I swear I called Superchips a couple of months ago and was told they DON'T make one for that model. I have an e-mail in to them now to confirm one way or the other. I'll let you guys know. --Mitch