Quote:
Originally Posted by lee polowczuk
what is the CAN bus? it's the 104 engine...so it's not very complicated
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Mercedes was an early adopter of electronics and started using CAN bus in 1992 (earlier?).
A CAN bus car is one whose ECM (Engine Control Module) polls various sensors repeatedly to determine the state of things. Much like how a computer mouse is always checking it's location so when you click a button it knows what to do. When you turn off the engine everything is reset, then a few seconds later the ECU senses the error and turns the oil light on again.
The way to reset it is to disconnect the battery and wait about 10-15 min before reconnecting. Of course, be sure to have your radio code handy and some features (sunroof, windows, etc) may need to be resynced. This often doesn't work anymore than rebooting your computer solves a hard disk problem. But it is cheap so maybe worth a try. Also, sensor is pretty cheap for a M104.
Hope this helps some.