kali

i am seeing ebay .
some of them have wire with plug, some dont have wire but only plugs.

friends , what should i buy ?
if wires are obligation , why they sell spark plugs without wire?

i want to know the difference .
thank you !

p.s) i have sl55amg of 2003

Rudeney

Scheduled service calls only for replacing the plugs. You only need to replace the wires if you have problems with them.