My W124 wagon is not keeping up with our 90 degree weather anymore.

My tech had told me that my fittings indicated that my system was retro'd to R134, although there is no sticker that I've found to document this.

I suspect a leak.

I'm tempted to add some R134 before it's all gone.

I was at Target today and was checking out their selection of cans of stuff from Interdynamics.

They have straight R134 for 9.99 a can, and a couple of other products that include sealers and cleaners, which instinct, and previous Mercedesshop.com posts told me to avoid.

They also sell a couple of low side guages, and the 39.99 "death kit" with that has three cans of oil and R134, and a low side guage.

I figure that since my system was already retro'd, the "death" thing might not apply in my case.

I'm not sure how the oil would get into the gas anyway, if one keeps the can upright, but I also don't want to deprive my system of lubricant.

My AC test equipment consists of not much more than my brain at this point, and I'm trying to get the most bang for the buck without getting my tech involved.

My question is, without wanting to flush the whole system and stuff, would you guys be inclined to recharge with straight R134 or use the R134 with oil?

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Bob Roe
Lehigh Valley PA USA
1973 Olds 88, 1972 MB 280SE, 1978 Datsun 280Z, 1971 Ford T-Bird, 1972 Olds 88, 1983 Nissan Sentra, 1985 Sentra, 1973 230.6, 1990 Acura Integra, 1991 Volvo 940GLE wagon, 1983 300SD, 1984 300SD, 1995 Subaru Legacy L wagon, 2002 Mountaineer, 1991 300TE wagon, 2008 Murano, 2007 R320CDI 4Matic 52K, some Hyundai, 2008 BMW 535xi wagon, all gone... currently
2007 Honda Odyssey Touring, 2014 E350 4matic