Hi there....
Rear roof panoramic panel is glass. Front panoramic panel is polycarbonate.....and it crazes....
Nothing you can do to 'remove' the crazing.....except replace the panel, which is a dam expensive !
The only other viable 'option' as such is to 'fly-eyes' the entire roof in a colour that closely matches
your panel colours, or a colour that matches your Tridion. See pictures of JJ's Brab with orange
'fly-eye'd' roof. I've been thinking of doing mine to match my body panels as the crazing is a tad
'upsetting', but it's not a safety issue...and besides, I've not got round to ordering the stuff...yet.
Re your :-
"What's that in front of the passenger seat ?" Can we have a picture please....before we hazard a guess/opinion/answer ?
The gear knob comes up by pulling upwards...hard. B U T be warned...others have ended up
smacking themselves in the face/chin whe doing it..so lean your head away when you do it.
Have a read of this topic which describes it all....
http://www.forfour.co.uk/forum/index.php?topic=704.0