In general, the most worrisome situation on the road is your car producing a rattling noise suddenly when you accelerate. Moreover, the rattling noise produced by the Audi engine is affecting the drivability of your car in a long run. Due to numerous reasons, your Audi is producing a rattling noise under acceleration that needs proper diagnosis and repair. The following slide defines the reason behind the engine of your Audi making a rattling noise when you accelerate.