Has it ever been done? I think it would be particularly awesome in a wagon where you really need to fill that big cabin with some cold (or hot) air.

Is there enough room in the tunnel to do this? I was thinking about just adding the rear vents to the tunnel with a duct to the main system and an additional 12v fan to be triggered on w/ the main blower. Could be cool, right?

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'90 300SE --- 173k miles --- (Odometer just stopped working!)

'85 Cali 300D --- 193500 miles --- (Second one) Sold Nov '10

'82 300TDT --- 236,xxx miles --- (My first one) Sold July '09

It should be possible but may not be practical, in that the factory a/c system can move only so much heat out of the passenger compartment. There may not be enough room in the tunnel for an additional duct but something that is oval shaped might be made to fit.

Another option, simpler and less sophisticated, would be a small fan or two that would blow some of the cooler air in the front of the passenger compartment towards the rear.

If you find something that works, post pictures.

Jeremy

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"Buster" in the '95

Our all-Diesel family
1996 E300D (W210) . .338,000 miles Wife's car
2005 E320 CDI . . 113,000 miles My car
Santa Rosa population 176,762 (2022)
Total. . . . . . . . . . . . 627,762
"Oh lord won't you buy me a Mercedes Benz."
-- Janis Joplin, October 1, 1970

Will do.

I'll be hitting up the PNP this wednesday. I plan to keep an eye out for anything that may work.

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'90 300SE --- 173k miles --- (Odometer just stopped working!)

'85 Cali 300D --- 193500 miles --- (Second one) Sold Nov '10

'82 300TDT --- 236,xxx miles --- (My first one) Sold July '09

I'd look at how its done on a W126 and try to copy that system.

-J

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1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket

Tesla Model 3. 205,000 miles. Been to 48 states!
Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels.
2014 Cadillac ELR
2013 Fiat 500E.