Hi guys started working on this 1973 280E w114 M110 engine and while most looks good the cold start idle is very low. I have to hold the accelerator for 4mins till it warms up. When it reaches normal operation temp it idles fine (a little low perhaps but doesn't stall anyway)

According to the manual I have to check the Aux Air Valve but have been unable to locate it from the diagram anyone have a picture (clear one) where this is? I think it may be jammed closed or may have been disconnected (blocked off) by previous owner?

Or is there any other thing to look at for the problem of low idle at cold start?


Thanks again guys BI