Just got a '79 300SD. It is still R-12 and has never been touched, even has the original r/d. Should this be as cold as my dad's recently converted 300E? It was converted to r-134a. My A/C in the SD is horrible. Their aren't any leaks. Should a car like that have very cold A/C?
Thanks
David

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2000 Honda Accord V6 137k miles

1972 300SEL 4.5 98k miles

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