If it is early 1990's the fuel filter is in engine compartment on right hand side if your looking undeer hood. It is a big silver thing mounted to the firewall. There is just 2 clips holding it on ( top and bottom) when you get new filter it will have these clips.
THE FUEL FILTER IS UNDER THE HOOD ON THE WHEEL WELL, LEFT OF THE ALTERNATOR.
Should be just one.
location fuel pump relay 92' merc topaz
Sorry , no ansewer because no Topaz 1995 ; last production was 1994.
Feul filter for 89 topez is mounted on the passengers inner wheel well
Inside the engine compartment on the passenger side wheel well.
Find it in the fuel line. I don't think it requires any special tools.
it will be in the fuel tank.
the fuel filter on the 92 topaz is located on the right inside fender, on the 90 it may be in the same place, if not you can follow the fuel line from the gas tank to the front of the vehicle and it should be visible.
passdenger side inner fender next to coolant overflow bottle
near fuel thank
Inside the fuel tank.