no, upon further inspection it's the one in back of the one that's unplugged, that big one in back of the one that's unpluged. That's where my coolant temp sensor is located, I don't even have the plug in the picture..but I have an absolutely base 1990 300TE with no options at all as far I can tell. I wonder what that other one is for...I have no heated leather seats, 4-Matic, traction control...nothing..just a regular 2 wheel drive 300TE. Let me know what that is because I think the plug behind that one pictured is the coolant temp sensor...hmmm...interesting...cliff