[W126 Coupe] Air conditioning Issues

[Iain Gunn]

I have been using Duracool for about 4 years now and have no complaints, I 
have also filled probably 2 dozen a/c systems with it in that same time with 
no complaints. My 86 560 SEL was converted to 134 when B4 bought it and has 
worked fine for the last 5 years. Surprisingly I have never had to mess with 
it. My 90 190E 2.6, I topped up this year with Duracool, works fine. The 86 
560 SEC Koineg was converted to Duracool. and worked fine for the 3 years I 
had the car B4 I sold it.
Duracool Does NOT contain any 134.
                                                                Cheers, Iain

 Some thoughts on the MB AC Freon issues that I thought I'd pass along.
> Just yesterday, I stopped to discuss the seemingly long waiting period for 
> my '90 SEC to cool down at 95 to 98 degrees ambient outside temp.with an 
> A.C. specialist that works on my classic American cars very 
> satisfactorily.  My system is fine, he says it just takes a little longer 
> in these hot days and I need to be patient especially when the humidity is 
> high but what he did point out very strongly was "Do not change this R-12 
> Freon to R-134 or Freeze 12.(Freeze 12 contains 80% 134) Suck up the cost 
> of R-12 @$40 a pound". He suggested that I find R 12 at swap meets and 
> stock pile it if I'm going to keep the SEC
>
> He told me that he has changed the products at the request of  mid '80s to 
> early '90s MB owners (under protest) and to a person, they have come back 
> dissatisfied with the cooling capabilities of their cars.  He has 
> converted my '64 Impala SS and my '71 442 convertible to R134 and they 
> work fine and he agrees that  they should but the MBs just don't react the 
> same. He does not have an explanation why . If others have made the change 
> successfully, I'd be interested as a general education point in the event 
> I need to consider this in spite Neils advice.
>
> Doug
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