http://www.b-hague.co.uk/camera_suction_pads_vacuum_mounts.htm]cam suction pads
can highly recommend their "SM1" kit for front screen, have it in combination with Sony DCR PC 350, not the cheapest mini dv around, well to say it, it's on of the most expensive one's, but 3CCD chip for PERFECT vids, just hate the quality of 1CCD cams especially on tracks like Nordschleife where there're many many light - dark changes
http://www.b-hague.co.uk/Mounting%20Brackets.htm#SC1]headrest mounting version
also a very good choice but rather useless for e.g. GT3, 997 ... seats... so i'm always using the suction mount, extremely stable even on bumpy Nordschleife, very easy to install / remove
just put it on the glass after the entry gates to the track pump it up and it's ready...
besides, that shop from UK is soooooooooooooo cheap, in my foto shop i'd have paid 140 Euro JUST for the Manfrotto suction device WITHOUT all the other mounting stuff !!!
VERDAMMT ... jetzt bin i schon komplett deppat - bin jetzt erst drauf gekommen dass dies ja eine deutsche frage war
kennt des wer dass man eigentlich alles zuerst auf englisch macht obwohl man deutsch sprechen könnt....
na ja, i glaub du hast mi trotzdem, falls nu fragen sind don't hesitate to ask