What is exactly knock control in 156 Evro3 ME7.3.1. It changes from off to on, does this mean that there are detonations. When the engine is idle with AC on it stays almost all the time to on. When the AC is off it is sometimes off sometimes not.

I am also having problems connecting with Bluetooth ELM327 v 1.3a. I get timeout errors. I have tested all sort of settings with no luck at all. When I use hyper terminal or putty to open the comport directly everything is fine and I have no timeouts and disconnects I am able to send commands to the...