Hi all,

I happen to have two at hand. Both used and not in good shape I'm afraid ;-))

Houses for center vent and footwell flap are different, membrane is the same. Other may be the same too.

At 15:59 -0400 06.20.06, John Pirtle wrote:
>I have three dead actuators - heater, defroster, and center comb flap.
>I can't believe the price of the replacements!!! Has anyone used these?
> http://www.autoluxmbz.com  
>This company sells the rubber bladders separately for $5. I'll bet it's better rubber too.... Says it's "ozone resistant."
>Made for Mercedes but these things have gotta be all the same. ?? John
>Pirtle http://members.rennlist.com/pirtle


Hi John,

Diameter and throw come into play. And the engineer below said the most durable 'phragms are rubber coated fabric. I ran across his company after reading this thread http://forums.rennlist.com/rennforums/showthread.php?t=271923
"The Search for the Perfect Condom (vacuum actuator diaphragms)"
And I sent pix of the actuator and diaphragm from here:

He actually called me and we talked for ~15 minutes. He was knowledgeable and easy to talk to. Much more knowledgeable than I - not hard as my knowledge is purely from reading and PIX (i.e., I don't nuffin 'bout no fixin' no actuators). He _guessed_ it might be a Honeywell 240013 diaphragm.

If he had one in hand, he said, they could find it or dupe it. The latter being the expensive way, until the volume ramps up.

So, John, do you have one or more in hand? If you have more than one out, are they all the same?


>Date: Wed, 14 Jun 2006 11:15:12 -0500
>From: Mike Hinshaw <mikeh@metrommp.com>
>Subject: RE: Vacuum Actuator Diaphragms Will, Thanks for your inquiry.
>Can you send me a photo or a sample of what you are referring to along with some type of idea of your volumes and target prices? We can then take it from there. I look forward to hearing from you. Best regards, Mike Hinshaw
>New Product Development Manager
>Metro Moulded Parts, Inc.
>800-878-2237 x136

Vacuum pod membrane dimensions:

       _ _

       [ ]        outer diameter 12mm, inner diameter 8mm (hole), height 7.5mm

   ____[ ]____

  [           ]

  [           ]

 _[___________]_  outer diameter 29.5mm, inner diameter 29mm, height 19mm

[_______________] outer diameter 41mm, inner diameter 38mm, height 4.8mm

See if anything fits.



'88 928s4 cherry red

The Netherlands






Defroster actuator


 Center console removed

The actuators, and Ed Scherer's trick to re-attach the lever of the comb flap actuator. (it is a bitch.....)


Typical puncture




The membrane rear view


The membrane front view


In case any of you ever need to replace any of the climate control vacuum actuator diaphragms you can get replacement rubber diaphragms for the recirculating suction flap diaphragm 92857307704 and others from:

969 OAK RIDGE TURNPIKE, SUITE 258 865-482-9175
OAK RIDGE, TN 37830 (Voice or FAX)

They are $6.00 each and easy to fix

The comb flap actuator looks like a double while the defrost and footwell look like singles - can't tell about the center nozzle one

A/C actuator vacuum pod repair, save 70% over new parts, Pod-Popper TM tool, $11; opens a/c actuator pods in seconds to replace diaphragms with ACC-DI TM replacement diaphragms, $6; repair time 3-4 minutes, fits most Mercedes actuator pods,Visa/MC.
Performance Analysis Co,
865-482-9175 voice or FAX, TN;
Yes I have tried the one on the AC recirculating flap (vacuum unit - suction) it is a single diaphragm one is an 100% compatible fit.
The Mercedes Clubs here in the states all promote these as the OEM parts are quite expensive.
The email for George Murphy is


Performance Analysis Co.
969 Oak Ridge Turnpike
Suite 258
Oak Ridge, TN 37830

(865) 482-9175 9am to 5pm ET Monday -Thursday; 'til 1pm Fridays or fax anytime

The 2010 is for a single diaphragm actuator or both a 2010 and a 2020 for the double diaphragm actuator - all are $6 each plus $5.95 S&H accept Visa/Mc . . .