Hi,
91 300ce
Whenever i use my a/c and press the recirculation button, nothing happens; I can still smell the fumes and air from outside the car. What should i do to fix this.
thanks
a

For you to shut off the "fresh" air from entering the car the TWO fresh air elements MUST both be closed..possibly a bad vacuum element is only partially closing off the fresh air door.

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Thanks M.B.Doc,

where is this vacuum element that closes the the fresh air door located? What does it look like?

thanks
a

Take a look at the vacuum routing...SEE that the 2 recric elements, # 42 have 2 diaphrams each!

Attached Files

W124 AC VACUUM.pdf (58.0 KB, 222 views)

__________________
MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator

Thanks for your help!

looks like its gonna be a pain to remove.
a

You need to start by doing vacuum tests at the switch-over valve OR at EACH of the 2 recric elements..you will need a hand vacuum pump w/guage to find the problem

__________________
MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator