As I was stuck in traffic coming home today I was thinking... it's 100*F out according to the temp sensor on the bumper of my TDI, and the AC is spitting out glorious 41*F air with the fan on maximum and the resirc door closed. Turn off resirc and it would blow 60*. A 40*F drop at idle is quite impressive IMHO, moreso when you look at the 260,000 mile condenser and notice how many fins are bent over. I could feel the radiator fans kicking on and off of high speed. VW has used variable displacement compressors since 1993, so the clutch never disengages when the AC is un unless the evaporator starts to ice up.

From what I've heard others say I could not expect this kind of performance from my SDL, even if it still had R12. What about the Benz's system makes it have worse performance? Size of the evaporator or condensor too small? Compressor doesn't flow enough volume? In a perfect world could you install different parts to increase capacity? I'd love to find a way to install a variable displacement compressor so the clutch wouldn't have to cycle all the time.

I guess this delves a bit into AC theory, but that's something I'd like to know more about

-Jason

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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.