Hello, I hope someone here has some advice for us. We bought a Opel Mokka (used car) at the beginning of March. The first 2 weeks he ran great, but then he started to make funny “tackers” sounds, irregularly so not as if you could say ok always when it got cold or when he was warm. To these “tackers” it came up in the 2 aisles louder and a loss of performance also came up. Since it was very irregular we recorded it once when this noise came to the workshop already has a hint. We then made an appointment in the car house / workshop where we bought the car. However, the so much we had to do for a long time. Well, the car is now Thursday 15.04 with us and was probably already driven (via the highway), then you called to this morning and said there is nothing we can find, that I have almost thought of something coming up. If you have a tip, I would hang you in the attachment in audio file.