The 350SDL started acting weird this morning…. No glow plug light when I went to start it up, or if it did come on it was only for a few seconds and I missed it. Ambient was maybe 50F, possibly a little warmer. About 5-10 minutes later as I’m driving down the street, the glow plug light comes on and stays on for a short time, then goes off.
Weird. At lunch I went out and the light lit for maybe 5-10 seconds and went out. Again, it came on while I was driving a few minutes later for a short time and then went out. Same thing on the drive home today. As I look at the service manual, it says that one of the fault indicators is no preglow lamp at startup, then the light can light up for approximately one minute while driving. Fault: One or more glow plugs defective. So I’m wondering if I’ve got a bad glow plug. I just swapped them all out less than 10k ago, probably even less than that. But - there’s more… The AC started acting up. Hot air, literally HOT air coming out of the vents. I checked the monovalve, it’s good. Checked the AC system, everything is good there as far as pressures and charge, but the low pressure line is not cold. High pressure is. I put a clamp on the coolant line to the cabin to isolate the heater and drove the car. I can get duct temps down to about 70F and that’s it. Pressures are correct for the ambient temperature and humidity. It’s almost like I was getting heat during cooling, but I’m not getting decent output from the system to begin with. Both of these issues started at the same time. I can’t see how they’re related. ??? -D _______________________________________ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
