Friends, for my 2011 Cadillac CTS 4 Coupe I would like to buy an OBD diagnostic device… It’s less about deleting significant error messages (the way leads me to the workshop) but I’d like to make codings, e.g. day running light (if that works at all), learning tire pressure sensors, hopping on when locking etc. A request from a supplier provided that devices for this purpose are not less than € 3,000 (!) for my vehicle. However, I had “my drop” within reach… Please let me know if this information is correct or rather a fake… First of all, thank you Jens