A friend that is a trucker was telling me that his rig now has a built in timer to heat the engine. Apparently it begins to blow hot air through it 30 minutes before intended startup.

Has anyone rigged such a contraption in their MB? My daughter has gone off to college and I'm worried about her '84 300D sitting out all night and not plugged in.

I was wondering if a second battery (kind of like a house battery in a motorhome) could be on constant charge from the main battery and activate some type of hot air pre-heat?

Ideas?

Don

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DAILY DRIVERS:
'84 300DT 298k (Aubrey's)
'99.5 Jetta TDI IV 251k (Julie's)
'97 Jetta TDI 127k (Amber's)
'97 Jetta TDI 186k (Matt's)
'96 Passat TDI 237k (Don's
'84 300D 211k Mint (Arne- Undergoing Greasecar Conversion)

SOLD:
'82 240D 229k (Matt's - Converted-300DT w/ 4 speed