I get 42 Degrees F in my 560SL and 300D on a 95 degrees F day. This is at a normal driving speed. I have actually been quite satisfied with my 134a conversions on Mercedes. My BMW didn't fare so well!

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All the best,

J. P. Mose
1968 250SL
1970 280SE 3.5 Cabrio
1987 560SL
1990 560SEL