My spark plugs were replaced recently (Bosch copper) and I just put in a new Bosch distributor cap and Bosch rotor.

1. How much of a difference do ignition wires make if I were to replace mine in my 1989 300ce? Mine may be the original.

2. What is the life expectancy of wires roughly?

3. What are the best ones to buy Bosch, Beru, FACET etc. ?

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1989 300CE Astralsilber/Schwarz
1992 300CE Schwarz/Schwarz