I have mentioned in some threads before that it is not always possible to disable the DRL. Certainly I am adament that this is the case for my 2000 MY car as I invesigated doing it myself. You likely face the same problem with your motor. The problem you - and your Dad - will have I think is that the lights are all controlled by the CEM (central electronics module) and the switch does nothing other than provide inputs to this. Consulting the wiring diagram there are three wires coming out of the CEM to the switch. Call them A, B, C. In the three cases the connections are made as follows: posn 0 (DRL): A connects to B posn 1 (sidelights): All n/c posn 2 (On): B connects to C So one would think that cutting wire A so that posn 0 is the same as posn 1 would do it. Not so! Like this the sidelights are ALWAYS on even when the ignition is off. I know this because that's what happened to me after I cut a wire, I thought "yes, I've done it" got out the car and thought "umm... it looks like those sidelights are on". BTW the above is a good reason never to remove the light switch unit from the car and leave it off... you may well find your sidelights are permenantly on! Why does this happen, then? The reason: because (I presume) you can always turn sidelights on by putting the switch to position 1, even if engine is off. So the CEM assumes this is what is happening (which is fair point, as posn 0 has become the same as posn 1) and turns on front sidelights. Now the sidelights (front AND rear) are themselves interesting because it appears that they are enabled by the CEM WHENEVER the ignition is on. i.e there is bog all you can do about it and it has nothing to do with the position of the light switch. Although the switch is a double throw switch the second one isn't connected anywhere. So it would seem the only way out of this is to re-program the CEM (if that is even possible for the lighting function) or to insert additional suitably high current switche(s) into the wires to the sidelights and then cut the wire which connects to A (above), which is ALLEDGEDLY violet in colour (although I have a feeling mine wasn't). Pete