Interesting.

If the difference is just in the fittings, then I wonder why cars that are converted from R12 don't cool as well.

There must be something else different, then.

__________________
Paul S.

2001 E430, Bourdeaux Red, Oyster interior.
79,200 miles.

1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".