Hello on my Mokka Bj 2014 the brake pedal doesn’t quite return to the original position.So the brake light also lights up and there is also a light brake while the ride is present. Brake fluid has now been changed because air was suspected.But everything was still with the old. Had someone the same problem and can say main brake cylinder, brake power amplifier or vacuum line or valve defective. Look forward to any hint. Greeting Klaus PS how do I recognize a defective brake cylin the, BKV or the vacuum line.Actually, I know the phenomena or have a mistake in thinking I have already received the tip to the friendly one.