Hi Scotty,
Greetings from virus paralyzed United Kingdom 🙂 /p>
Couple of years ago you responded to my email and it was very helpful. Few things changed since... I bought nice BMW in good shape (640d F06 2016 3.0 automatic manufactured in the Germany, full service history and only 20k miles).
1st
Car is lovely, however, when I stop on the red light, after 2-3 seconds I can hear a noise coming from the front and I feel gentle friction on the break pedal. It feels like car disengaged clutch, slotted in first gear and wants to drive but I hold it on the break. It's louder when engine is cold, it gets better after 50-100 miles but never stops.
I had it in other cards with automatic transmission so it is not only BMW related. Interesting bit - when I switch to flappy pedal gearbox (semi automatic) or switch to Sport mode - it doesn't happen. Only happens in normal (comfort) driving mode.
- What can it be ?
and
2nd
I went to automatic car-wash and (I was inside) I heard a loud bang/noise when front alloys were washed then again when rear alloys were washed. Car was positioned perfectly between rails so I don't know what could have caused that.
Take wheels off and inspect wheel speed sensors for grime/dirt that may have infiltrated them. I suspect the car wash washed something in them and also likely responsible for the noise during the wash (abs/etc control activated strangely because it thought the car was moving). Also inspect wiring connector on wheel sensors for damage as the wash may have caused mechanical/physical damage. In other modes the ecm operates the etc differently so I'd would drive it, if necessary, in those modes as not to cause additional damage until the issue is fixed.
Thanks @hillbilly
I am suspecting something like that but without lifting car I cannot check it. Hopefully my friend who is mechanician will allow me to pop in and use his lift & take the wheels off. It was a massive noise when this happened so I think that brak pad might have been dislodged, or something similar happened.