Make sure if you are going with Bosch to get them from the Dealer! I have ordered brand new Bosch wires from other sources and got ones where the resistor ends read 1.5KOhms even though they state that they are 1KOhm ones! From the dealer I get 1KOhm from there ends! Yeah they are $30 instead of $10-15 from other sources but they are at least within spec!

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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.....

Is the resistance measured by inserting one probe into each end of the ignition wire? If so, I measured appx 1,100 k ohms per wire. Is that within spec?

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87 300e (white/black; amg body kit)
88 300ce (red/cream; amg body kit)
93 300ce cabrio (white/blue/blue top)
93 300ce cabrio (black/grey/black top)
98 ml 320 (totaled @ 137,000 miles)
99 clk320 (black/grey/black top)

You can measure it at just the connector, but to do a true one you measure from one end of the wire to the other! This will give you total resistance. I have never found anywhere that states what is in spec or not. I assume 100 Ohm's either way should be fine, but I would say they all should match. Right now I have 1000 on one and 1200 on the other three and I have a stightly feelable idle. Not bad and jumping around but noticeable!

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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.....