my ac blows when i click the car to the glowplug position. this is the only time i can get a response from any of the ac/heater controls. when i go to start the car it shuts off and none of the buttons work.
anyone know how to fix this?

When you let the key return to "RUN" position after engaging the starter, does the blower work again? Usually all accessories are cancelled when the key is in the "START" position.

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My Truck.. 2007 DODGE, 5.9 Cummins, 6spd stick, 4X4. My car..1977 240D, OTHER WHEELS...1955 VW Oval window bug, European Delivery (Holland) with a 1700cc, 2 barrel, Porsche drum brakes. 1939 WILLYS Pick-up. 1967 Triumph 200cc Tiger Cub. 1976 Honda 550F 4cyl Motor Cycle.

it dosent turn on after you start it. it only works when in the glowpug warming position.

very odd?

It's possible the electrical portion of your ignition switch is bad. Can you get the fan to work by wiggling the switch back and forth a little when it's running? I had a similar issue on my 300D, the fan would only work if I turned the key slightly back after the car was running. To fix it, I replaced this:

http://catalog.eautopartscatalog.com/mercedesshop/sophio/wizard.jsp?partner=mercedesshop&clientid=catalog.mercedesshop&baseurl=http://catalog.peachparts.com/&cookieid=1CQ0J3JZ41VD15JLOC&year=1982&make=MB&model=300-DT-001&category=All&part=Ignition+Switch

BTW, what year and model is your car?

i dont know if this is related but in order to engage the starter i have to move the shifter rapidly while turning the key.