Audi A4 V6 1996 spark plugs!! Help plz

Hey everyone I bought an Audi A4 96 and I wanted to change the spark plugs.
I've bought the spark plugs already because I thought it would be easy to change them, but the problem is that I cant take the old spark plugs out.
Since I have no experience with Audis. I have changed spark plugs on other makes but not on an Audi.

Could anyone tell me how to take them out? In other cars you take the cable out in order to reach the spark plug with the socket; however in the audi seems like is kinda hard to take the cable out!
I've tried to take it out by pulling it with my hand but its hard! Do I need to unscrew anything?

any help will be really appreciated

Thanks