My 2002 325i was submerged in approximately 20" of water for ~3 hours - midway up bottom seat cushion. Did not get up to dash. I got to car 3 hours after flood and engine started and runs fine. Seat adjustor on drivers side does not work, and air bag deployment red light is on. Other than that all seems well. Question - do wheel bearings need to be re-greased, or are they sealed, and what about my manual transmission and gear box fluid? Motor oil is fine. Any advice??