The A/C in my '79 240D has always been anemic and I suspect there is a leak somewhere since it's never really produced frigid air. I'm not expecting polar blasts from this completely stock, OEM air conditioning system powered by a 2400cc diesel engine, but would expect air cooler than the outside air!

That said, I'm seriously considering taking the car to a dedicated A/C Shop in town and having them 'overhaul' the system - check for leaks, make repairs, clean out/flush the system, etc. I expect them to find a leak or two; hopefully nothing too expensive to fix.

Question - With all this work being done, is it possible to convert the existing OEM system to R134a at the same time?

I would seriously consider this as A) R134a is more environmentally friendly than R12 (though still not perfect) and, B) I can legally work on the system (recharge, etc.) in the future as a DIY mechanic. (There are restrictions for discharge of R12, for example.)

Cheers,
Jeff

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MBCA Member #B012089 (Lone Star Section)
OBK Member #47 (W123 Division)
'96 SL600 (105K) Triple Black - Mein über-Fräulein
'79 240D (292K) Yellow/Saddle - Mein Spielzeug
'01 ML430 (123K) Black/Saddle - Wife's Ride
'94 SL500 (164K) Green/Champagne - Daughter's Dream
'73 450SL - RIP
'86 300E - RIP
'88 420SEL - SOLD
'94 S320 - SOLD