What causes the engine of an Audi to misfire and how can it be fixed?

I've noticed that my Audi's engine has been misfiring, causing rough idling and loss of power. What could be causing this issue and how can it be resolved?

One common cause of engine misfiring in Audis is faulty spark plugs. They can become worn or dirty over time, leading to improper ignition of the fuel-air mixture. The solution is to have them replaced regularly by a certified mechanic.