I'm pretty sure all 16v 2 door have electric windows also ,so if the door trims doesn't have blanking plugs where winders used to be that's a good sign , I'm pretty sure central locking was standard also on 16v , aerial, speedo , glovebox badge already mentioned , is the sticker in the boot about 4 inch square white paper (it will have vin no and eng no in it) will confirm all your queries
All UK mk2 GTI have sunroofs. , all big door window (88 on) 16v have 256mm front brakes and bigger input spline on clutch (not that you can see that) .
89 Mk2 3dr GTI , tornado red , 20V Turbo - weekend sleeper WRX eater 😃 , work in progress .
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