I have a 1992 940 GL. The speedometer does not work. My mechanic has replaced the speed sensor, but that did not correct the problem. He then located a used guage cluster, but the gas guage didn't work, and only part of the instrument panel lit up at night. I am looking for either some addtional thoughts about what might be causing the speedometer not to work, or for ideas on where to locate a reliable used guage cluster.