Going home from Grindelwald meeting I had my Engine Control Light burning nearly constantly (for more than 1200km's, engine worked without problems). My dealer checked all sensors involved, especially the knocking sensor for the right cylinder suspected by the error code. No error found, finally exchanged the ECU under warranty.
My M3W now runs much better at lower rpm's, although few hick-ups occur now in traffic jam with hot engine.
All in all, the new ECU is a big improvement!
