You are calling them spark plug wires, but they are technically coil wires.

I wouldn't recommend replacing them, but you can if it makes you feel better.

Remember, it's not the coil wire that goes bad, but the connection with the resistor end.

__________________
Paul S.

2001 E430, Bourdeaux Red, Oyster interior.
79,200 miles.

1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".