Speedometer, tachometer, and turbo meter not working.

What is your question?

My tachometer doesn't work it just goes wherever it wants. My speedometer doesn't go lower than 7 mph even when the car is stopped and in park and my turbo meter only goes about a quarter of the way down. Could it be an electrical issue and if so which fuse controls these? Also the lock button on the inside of the drivers door only works when the door is closed.

What makes this problem better or worse?

Nothing

How long has your 2005 Saab 9-3 had this problem?

Since I bought the car a month ago