No Air from the Center

[jpnanda]

Can anyone suggest to me what could be wrong with my car..it is a 86 300E ..I have air coming from every vent except the center one..u can hear the blower motor working but some how no Air comes out from Center vent. Driver side vent has good flow of Air and I get air blow from the bottom vents but nothing from the center vent...pl HeLP

[Ron in SC]

The vacuum element that controls that door probably has a leak and it need to be replaced. The dash needs to be removed to replace it.

[raymr]

You should also check the solenoids located in the right side of the center console. I think they are called change-over valves. They apply the vacuum going to the elements and eventually burn out. I tested all mine and replaced 3 bad ones.

[jpnanda]

thank you all for the advice..I had to take the glove box out and had to tie down the vaccum unit so no air went to the vents near the windshield and kind of opened up the center vents..now I am getting some air from the center vent..but it is just a quick (temp) fix..do I need to replace all the parts controlling the vents..for it work..or could it be some thing else or if some one can suggest what I should do and parts should I order..thanks guys

[andmoon]

Go look over in the diesel section for fixes.
Diesel member's fixes range from replacement to coat hangers and they all direct flow to the center vents.

[cjlipps]

JP. Am having similar problem with my '90 300E. Seems to be vacuum related. Have been told by mechanic that the flap-actuating vac solenoids in the dash are difficult to access. He is an independent M-B tech with lots of experience. He has a "vacuum system analysis" that he claims will pinpoint vac element problems and costs about $79. This, of course, is not including any repairs or parts. Anyone heard of this procedure? Am considering it, in the meantime will watch this for additional posts and add any info I can.