I bought this car in December knowing these lights were on. Looking back, I would not do it again. However, the car runs and drives great (other than the ABS and Cruise Control doesn't work). I took the car to a shop to have them diagnose the problems. They said the codes that were comming up were:

Stop Light Switch
EGR
Upshift Delay
ECT Sensor Short
Air Mass Meter

They reset everything. I drove the car for about 500-600 miles before the Check Engine light came back on. I've read how to clean the EGR, and can replace the ECT Sensor. If the ECT Sensor was bad, wouldn't the Check Engine light come on right away? My thinking is that the EGR caused the light to come back on.

Is there a good, inexpensive code reader/reseter for my car? I don't want to spend another $170 to everytime my check engine light comes on.

The ASR & ABS lights are never on when the car is started. They seem to come on at a set speed (about 10-15 MPH), as long as I drive the car under that speed they stay off, no matter how long. I bought a new Stop Light Switch from the local MB Dealership and installed it. My ABS & ASR Lights still act the same. Is there a common problem that would cause these lights to come on? Could the Upshift Delay be the culprit? I wouldn't think so but I don't know either.

Thank you all in advance for the help.