Re: Air Conditioning 1991 300E

Maybe it depends on where you live, but out here in the California
desert and in Las Vegas I have not had any trouble finding licensed
shops where they are willing to recharge my 300 TDT with Freeze-12. I
first learned about Freeze-12 from one of the leading AC shops in Las
Vegas, where summertime afternoon temperatures are often over 120 in
the shade and there isn't any shade, so AC is practically a survival
issue out here. When I go to Vegas I drive through Death Valley both
ways, and it gets 130 F (in the 50s C) down there.

When my Benz AC is working properly, it keeps the car nice and cool
even on those 50 C afternoons in the blazing Sun. I put a thermometer
on the black asphalt at Badwater one summer afternoon. The kind of
thermometer that is a round disk with a needle that points to the
temperature. It spun around past 120 and just kept going until it
registered over 160 degrees F!

The biggest disadvantage of R-134a is that because of its molecular
structure it has to be compressed to a higher pressure to reliquify.
This higher pressure can cause older components to fail when they
would continue to operate normally with R-12 or even Freeze-12 which
has pressure curves more like R-12 than R-134a has.

On May 21, 7:41 pm, Wan-ning Tan <sun...@xxxxxxxxx> wrote:
Unless you are willing to work on the AC by yourself, do not use
anything other than R-12 or R-134a. No licensed shop will work
(including evacuation) on the AC system due to possible contamination to
their equipments.
.

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