Martyszy1
10-13-2015, 06:52 AM
Hi! My 97 C230 has the center vent issue that others have described on here and on the other forums. Comes up full when starting up and then defaults to sides and defrost upon acceleration. Comes on and off with throttle changes then after a while doent come back on. I checked all my engine vacuum lines and plugged a couple of cracked boots, took out the vacuum solenoid for the center vent and its holding air . When I was under the dash the solenoid worked fine, of course. No CEL codes at all I have a hand held vacuum pump that I am going to use to test the lines BUT is there anywhere I should look to first? Ty