Why does my 1991 Audi 80 have a rattling noise under acceleration?

I recently purchased a 1991 Audi 80 and have noticed a rattling noise coming from under the car when I accelerate. It seems to go away when I let off the gas. What could be causing this and how can I fix it? Thank you in advance!

Based on your description, it sounds like there may be an issue with your exhaust system, specifically the exhaust heat shield. This component can become loose over time and cause rattling noises when the car is in motion. It's important to have this checked and repaired as soon as possible to avoid any potential safety hazards or further damage to your car.

Another possible cause could be a worn out or damaged engine mount. This can also result in rattling noises under acceleration. It's best to have a mechanic inspect the engine mounts and replace them if necessary. Keep in mind that worn engine mounts can also affect the overall performance and handling of your car.