_Zeq,

_{Sorry to rag on you mate but you gotta read more about cars! The spark plugs are probably the chepest thing you will replace on your S320. I believe there are six of them, since it isn't a dual spark engine, and its as simple as taking a bolt and putting it back in. Personally, there is no reason for you to take this to a mechanic and have them replace them, since its such a simple job. Its the automotive equivalent of making a microvaveable dinner. If the mechanic charges you a lot of money, screw him and do it yourself. We can (or at least I can) walk you through it.}

_{Also fuel line is nothing spectacular..see the little lines running into your engine, with one at each cylinder? Those are the fuel injectors, and the line the feeds each one is the fuel line. Its very easy to replace, and since your car isn't an old diesel like mine, you don't have to prime the lines with fuel.}