On my 85 190e there is a hose that comes from under the intake and connects to the auxilary air device. This hose is pretty worn. Where does it go to under the intake? My car is not running well and so I figured replacing ALL the vacuum lines would be a good place to start (along with checking why one valve is tapping). The car idles at 1100 right now, but when I put it in gear (D or R) the rpms drop and it stalls. There is a slight miss at 2000 and not much power if I do get it into gear without stalling. Just an FYI: compression is at 152 across the board, it has new cap, rotor, plugs, timing chain, valves, guides, seals.