hey i have a 2003 c320 with 150,000 on it. cats went bad just replaced now im looking to do the spark plugs, how do you pull the wire off of the plug? been trying for the past hour. anything else i should look into changing?

engine you need the special boot tool remover.
It makes the job much easier and safer and faster and you won't ruin your wires.
You may want to get one otherwise headaches are due
diy for your engine variant is on www.benzworld.org w210 diy forum