TM78STG

Same here. It is related to the temperture: in the morning and also when I leave the office it doesn't work. Drive for a while, restart the engine and it's back to life. The thing is I am sure that this is a malfunction because when the ACC is dead, so is the horn and it won't work until the acc is back. I also have an Opel Astra and when it is hot (in summer), the CIM is loosing it's mind and the horn isn't working anymore. Maybe with the Kodiaq we are experiencing something similar.