hi all new to the forum but i have a 2007 c class coupe c200 cdi and i have access to launch diagnostic and i have activated cornering lights and i want to add passive tpms (no wheel sensors) i activated it in the insruments and electric ignition switch but cant get it to turn on in the abs any one have any ideas or know where else id need to activate it ? if it can only be activated by star does anyone in or around Nottingham have star diag system i have spoken to a mb indipendent in notts but he wants over 65 plus vat seems abit steep to me