How do I replace the spark plugs on my Audi A6?

My Audi A6 seems to be running rough lately and I think it may be the spark plugs. Can you walk me through the steps of replacing them?

Replacing spark plugs on an Audi A6 is a fairly straightforward task. Here's what you'll need to do:
1. Locate the spark plugs. On the A6, they can be found on top of the engine under the engine cover.
2. Carefully remove the engine cover, being sure not to damage any components.
3. Using a spark plug socket and ratchet, carefully remove the old spark plugs.
4. Inspect the old spark plugs for any signs of damage or wear, and replace them if needed.
5. Install the new spark plugs, being sure to properly torque them to the manufacturer's specifications.
6. Replace the engine cover and start the car to make sure everything is working properly. If not, recheck your work.