I've converted my 63k mi '87 300SDL back to R-12; flushed everything (probably lost brain a few brain cells in process), replaced drier and expansion valve (not fun), pulled vaccuum overnight and the results are outstanding.

However, when reviewing the the overall operation of the ACC, I notice that when I ask for full heat (wheel in Max pos) in "normal mode", the AC compressor continues to run. Is this normal? Ambient is 90 F. The AC compressor does cut out when I switch to "EC" mode or "Off". I've read the factory manuals (both 124 and 126), but have not found an answer. Thanks very much in advance for any advice.

__________________
as ever
Paul

1989 560SL
1987 300SDL
1987 300TD
1983 BMW 633CSi
1972 280SE 4.5