Ok, The seat belt light.....must be a loose connection under the seat, as for the dash warning lights, I would have the dash out and check the connections and relative bulbs.
Camshaft sensor, Possible as its main job is to control the injectors, but not the throttle!!! , erase the error and see if it comes back again straight away.
Camshaft sensor Intake.... whats before the intake?? MAF.
also take a read of this thread...idle prob:
http://www.bimmerwerkz.com/forum/3-s...hoo-62116.html
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