Where do you find the spark plugs on a 1995 Mercedes C280-6 cylinder?

Under the inspection panel on the top shield of the engine, held in place by 3 weird toped screws. Plugs in the holes at end of plug wires. Three spark plug wires are visible. The other three plugs are located under the coils. wiggle gently and lift straight up. Use compressed air and blow out the spark plug hole after loosining the plug so as not to contaminate the cylinder.