BMW Repair: my car, light switches, running lights

Question

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The text above is a follow-up to ...

-----Question-----
I have a 328I BMW and all my lights work but my little comp under the radio and cassette player keeps saying Brake Light Circuit / Check manual book. Is there any way i can fix this?
-----Answer-----
Erhan, are all your Brake light, Running lights, Back up lamps, and License plate lamps working properly? Physically check them and look for burnt or darkened bulbs.
-Evan

yes except the other day my dad said one of my park lights were out can that be the problem?

Answer
Erhan, that could be it. Check all the rear bulbs and socket holders for burnt contacts, bulb discoloration, etc. Replace components as necessary. The monitor in the check control works off of resistance so any corrosion on the bulb contacts or terminals will effect this. Also Brake/light switches in E36 models are known failure items up to 1999 but you didn't say what year your car was.
-Evan