Greetings Donnie,

I guess I really had the engine RPM set to low to allow the a/c to rotate at the proper loaded speed. Raising the idle up a tad really seemed to help to keep the clutch and compressor turning at idle. Is there any easy way to tell what the rpm is on these diesels without having a calibrated ear? I can generally set the older gas engines by ear, but these MB diesels are a bit trickier.

Thanks,

Charles