I just watched the show and Hamilton came through and totally relaxed while driving it. Too bad the track was wet and oily.
It was nice to see him in a little more normal and relaxed environment, he acted like your average 22 years old guy, not any different from my friends.
Clarkson: What's your everyday car?
Lewis: You know what I drive a GL500...oh....GL420.
Clarkson: What?
Lewis: it's a diesel .It's a pimpwagen,you can fit 24inch rims and just layin back and drive....it's what you need on the road...
He stumbled a little when telling which car he drives, probably didn't rehears enough

. The GL420 can't be his primary car, MB told him exactly to say in order to boost the GL-class sales and give it a hip image. I'm surprised he didn't say he rolls around in a 320 CDI.
Here's a link to the interview and laptime:
Video Top Gear and Louis Hamilton - car, racing, F1, Topgear, crash - Dailymotion Share Your Videos