A7 is combined instrument. A2 is the fuel system, where the code is most likely. A7 is also where you reset the service light, unless you have the spot in the gauge cluster, as many 95's do,

Hold the button down for three seconds...let it flash at you...it will flash, then pause, then flash, then pause, then flash...count the number of flashes between the pauses...for example....1 - 2 - 3, engine coolant temp sensor. Then do it again and see if you get the same code, if you don't, just continue reading codes until you get to the first one that you read. Then hold the button down for seven seconds, let up, when the light comes back on, hold the button down for another count of seven seconds (I know the book says different, but this works for me).

Chris