[W126 Coupe] air conditioner Refrigerant question

[Dick Spellman]

Hi Mike:

That could be a loss of vacuum supply at idle to the make-up air door vacuum
diaphragms (2).  Have you replaced these yet?  They are $60 each from MB or
just buy the rubber diaphragm kit from George Murphy, $45 does all the
elements in the car.

Easy enough to check these by attaching a MightyVac with gauge to each hose
going to the respective vac elements by locating the distribution valve
along side the HVAC unit in the center console.  I just pull the passenger
center console side carpet panel.

Stay cool.

Dick