Help with finding a episode.

Hello. Would any 2.4 fans be able to help me track down the name of an certain episode. I was a kid when I saw it sometime during the mid-nineties. The only story element I can recall is Gary buying an early kind of SatNav for his car much to Bill's irritation due to its high cost. That scene has always stuck in my mind as SatNav's were only just becoming available at the time and I thought it was pretty current of the writers back in the day. I was just wondering if anyone knew what year it was broadcast. Many thanks.