The TomTom car kit for the 22XX series now comes with a rigid mount as opposed to the flexible gooseneck in previous versions of the kit which you can see in figA at
http://www.tomtom.com/products/conte...284&Language=1. To combat the effects of an athermic windscreen you can use a re-radiating antennae which you can see at
http://www.totalpda.co.uk/product4481_372.aspx or
http://www.gpsoz.com.au/ra45.htm