VW Lupo 3L

A bit of a resurrection... but please could someone fill me in on the mod that's carried out the stalk that allows the bulb to stay on when high beam is selected? MG

I've imported a 2001 3L and I'm now driving it daily within the UK. I'm fairly useful with spanners (ex Porsche Tech) and have Vag-com which I've already used to carry out the gear selection basic settings procedure etc. I had an issue recently where I ended up replacing the speed sensor in the gearbox. While I was there and checking the measuring blocks, I noticed that the ECU is registering 147oC as an ambient temperature. The engine intake temp is ready sensible figures. None of the self study guides mention a sensor for this. Any ideas where it's getting the data from? I'd like to fit power steering to it but not the electric setup (I don't want to re-invent the car). Is it possible to use the power steering bracket/pump from a 1.4TDi engine? The rest is easy. Oh, last thing. I noticed that the coolant temp doesn't get very high (no more than 68oC today). As i can only see this in measuring blocks, I haven't been monitoring it regularly but will do. Is this normal? If this was a regular car, I'd say that the thermostat needed replacing. MG