Just seen this on the bay, are these any good
http://www.ebay.co.uk/itm/Mercedes-Benz-MB-OBD2-CAN-BUS-Fault-Code-Reader-Scanner-diagnostic-scan-tool-USB-/151409848905?&_trksid=p2056016.l4276
http://www.ebay.co.uk/itm/Mercedes-Benz-MB-OBD2-CAN-BUS-Fault-Code-Reader-Scanner-diagnostic-scan-tool-USB-/151409848905?&_trksid=p2056016.l4276