Does anyone know offhand what part I need to get the dashboard fuel and thermostat gauges working? Is it a relay? I'm taking it to my Volvo guy in a couple of weeks and would like an idea of what part I may need and the cost. I know there's about ten gallons of gas in the tank this minute (gas station pump clicks off at around five gallons) but it's reading empty and thermostat doesn't budge. It's been this way for a while. Otherwise, it's the tightest 240 in town. Bought it in 1990 w/100,000 miles, now has 170,000. Thanks