Can Anyone Advise Me Where The Location Of The "electronic Change Over Valve" Is And If It The Cause Of Heat Comming In Through The Side And Deforst Vents?

Lack of vacuum is the cause>> The vacyym switch-over valve is BESIDE the glove box, just to the right by the right outer a/c vent. You need to remove the glove box liner.

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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

I CHANGED: MONO ( BEHIDE THE VENT) VALVE, HEATER VALVE, REPLUGGED THE POD BEHIND THE CLUSTER.
ON ACCELERATION ON THE HIGH WAY HEAT BLAST IN, I'M LOOKING AT THE CHECK VALVE AT THE ABOVE THE FUSE BOX; BUT WHEN I DISCONNECT IT I HEAR PRESSURE RELEASED. AND I DISCONNECTED THE AUX WATER PUMP.[IMG][/IMG]ALL OPINS WELCOME

You need to get to the vacuum switch over valve & check each vacuum element...

Did you check the vacuum line that goes toward the right side of the car from that check valve under the hood. There is a vacuum storage tank under the right fender inner liner. THE vacuum line goes RIGHT by the battery & many times battery acid fumes EAT the plastic vacuum lines.

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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

Thankz M.B.DOC, I STAR4TING TO GET WORRIED.

Also is CC unit off when this happens and is the window open?

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~Jamie
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2003 Pewter C230K SC C1, C4, C5, C7, heated seats, CD Changer, and 6 Speed. ContiExtremes on the C7's.

1986 190E 2.3 Black, Auto, Mods to come soon.....