What is the most common cause of engine vibration in an Audi A6 ?

I've noticed a slight vibration in the engine of my Audi A6 and I'm wondering what the most common cause might be. It only occurs while the car is idling and goes away once I start driving. I want to make sure it's not a symptom of a larger issue. Any insights would be greatly appreciated.

The most common cause of engine vibration in an Audi A6 is worn out engine mounts. The mounts are responsible for holding the engine in place and if they become worn, the engine will start to vibrate. It's important to have them replaced as soon as possible to prevent further damage.

Another common cause of engine vibration in an Audi A6 is a misfiring engine. This can be caused by a variety of factors such as faulty spark plugs, a clogged fuel filter, or a dirty fuel injector. It's best to have a mechanic diagnose and fix the issue to prevent any further problems.