my 300e runs great 95 percent of the time. However, when I park after running and then before allowing to completely cool off I restart it, the engine runs very rough almost like it is misfiring or bogging down. That is until I give it some fuel and when the rpm's get up to 3000, it smoothes out. When I go to take off again, it accelerates rough as well (same problem) until the engine cools off some. There is a little oil in the antifreeze overflow. I have recently done a major tuneup. plugs, wires, all filters, etc. without any avail. There is some oil leaks around the engine in various places. And recently it seems to be running a little hotter than normal and this whole problem seems to be getting progressively worse. Any ideas?? Oh it has 248,000 miles

First thing I'd do is change the O2 Sensor if you haven't already. This made the biggest noticeable diff on my 91 300E. You can use the Bosch one made for the 95 Ford Mustangs and just splice the wires in (it's same O2 Sensor but without harness and available at Kragen, Autozone, etc.). Next would be to replace the coolant temparature sensor at the back of the engine near the firewall. Then, replace the Air Intake temp sensor on the air intake tube. I also replaced my rotor, ignition coil, plugs, and OVP but I don't think I notoced anything when I did that. I'm thinking it has something to do with a sensor because when it gets hot, it starts running worse which may be the O2 sensor sending bad readings from the exhaust. After that it could be anything, especially of someone messed with the Lambda (air mixture) adjsutment.