I just bought an 87 300SDL that was originally from Texas. Needless to say, the original owners didn't bother to have the electrical cord installed. I want to install the cord, even though it isn't essential to start the car (starts fine at 8°F). Do I just have to wire a cord to the terminals on the heater, or is there a special cord that you have to buy from the dealer?

I'm going to search, but I figured I'd post since this thread is already going.