Because my instrument cluster (IC) has some defective pixels I replaced it with an used one.
The procedure was painless, just pull out the instrument cluster (IC) and reconnect 2 connectors.
The old IC has no CEL or warnings. However when I start the engine the new IC shows 5 errors with CEL:

Engine Oil Level
Engine Fan
Break Lining wear
ABS - Anti-lock Brake System
ETS: el. Traction Support

I pulled the OBD II Codes and again found No Codes as before the replacement.
Those errors could have been there when the IC was removed from the donor car. I thought the IC was merely a display device except for the odometer but apparently it has a memory for other things too.

My questions:

1- will the warnings disappear after driving a while with the new instrument cluster adapting to the board computer?

2- If not how can I erase/reset the warnings on the new IC. As I tried erasing OBD II codes does not help.

Thanks for your inputs!

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1996 E320 since 1/16/08, 171K miles as of Feb 2011

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1989 300CE - R.I.P. Dec 29 2007
Other MBs (sold): 1992 300E-24 - 1979 350SLC - 1984 230E - 1990 300CE