My 93 300SD will not get any heat in the car.I posted about this earlier and everyone said mono valve.I checked the vaccum lines under hood/dash and everything is connected.I found the mono valve under the hood,it is on the left/drivers side on the front part of the wheel well.There are 5 hoses into it and 3 selonoids,one has 2 wires and the other has 3 wires.I checked the wires and both plugs have 12v coming into them.1 or 2 of the hoses are getting warm,I think these are the ones coming into the valve but I'm not sure.Does anyone know how to by-pass it,is that even possible?Is there a repair kit available?Someone mentioned repairing theirs in my earlier post.I did some loking online and found it listed as an ACC mono valve and boy was it $$$.Any ideas/suggestions?Been a couple of times could have used a little heat.