you have a 530

it doesnt have ignition wires.

there are 2 fuel filters part # 13 32 1 720 102 in the back right behind the wheel, about 1 foot towards the left of the car.

if you have never replaced them, DO IT NOW!

also, iridium spark plugs work very well with the M60, and you are in dire need of plugs if they are 8 years old.

you may also want to get new Motronic and Fuel Pump relays, as they can cause severe problems if worn (like after 12 years)