recently had prob with drivers window, switch didnt work well, think u might have same prob. The prob was with diry connectors both on wires and switch, cleaned them and works now well. Although my meg is from 1996. it could be the same prob with your switch.
The prob with the temp gauge is probably regarded to connector in the door, pull it off and try cleaning, u have nothin' to loose.
It's recommended not to move steering "towards maximum lock", that's all i know.
Hope it's all simple probz as i wrote