Hi
You need a new switch panel,
You can get these for less than £20 unless you want one that has aircon then that can be £100+
Please copy and paste link below.
http://cgi.ebay.co.uk/Citroen-Berlingo-Peugeot-Partner-Heater-controls-NEW_W0QQitemZ170296317215QQcmdZViewItemQQptZUK_CarsParts_Vehicles_CarParts_SM?hash=item170296317215&_trksid=p3286.c0.m14&_trkparms=72%3A1683%7C66%3A2%7C65%3A12%7C39%3A1%7C240%3A1318
Steve
March 2009