Seat heaters are wonderful but your hands and feet still need the heat.

Shertex, I can't imagine you idling enough to need the aux pump. Even if you are moving slowly, the car will still make heat happen, or at least it does in my w126.

Also, I've seen you drive, you don't idle much

We could always route a coolant hose through the floorboard with a shutoff valve controlled by an external temp sensor. Anytime its below 50 degrees, coolant is run through a pad in the floorboard.

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77' 300D, "Cartman" SOLD @ 150K (didn't know what I had)
83' 300SD, "The Superdon" 325k+ @ 28mpg
95 E320 wagon, "Millennium Falcon" 231k+ @ 24 Mpg
95 E300D, "Sherley" 308k @ 33.69 Mpg, currently anticipating a head
99 Suzuki Intruder "Trudy" @ 45 mpg