Yeah its a bit moody vw changing them, they both interchange from early to late, my mate pinched one out my engine donor car 4 his n had the fire. Serves him right 4 not askin! The switch/plug has more pins on 1 than the other, the germans shoulda thought of that and keyed the switch/ changed the pin layout altogether so it couldn't happen.. Its claimed the lives of a few mk2's now...