Most of the times the wires fail due to pulling on them trying to get them out. Or corrosion! Never really saw a wire fail if it was taken care of properly! Mine I had one bad one and replaced them all, end connector came off due to pulling! Not me but someone before me! Now I am just trying to find a good set as it seems that Bosch has some Crap stock that they send to certain suppliers. Seems the Benz Dealers are the only ones to get the supposed good ones.

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~Jamie
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2003 Pewter C230K SC C1, C4, C5, C7, heated seats, CD Changer, and 6 Speed. ContiExtremes on the C7's.

1986 190E 2.3 Black, Auto, Mods to come soon.....