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#1
07-01-2003, 09:18 PM
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Ignition coils on the 94 E320
When I was swapping the plug connectors and the spark plugs, I NOTICED that the middle ignition coil is DIFFERENT from the other two?! This doesn't seem right...are all three coils suppose to be the same spec? I guess I have to order an ignition coil to swap out the suspect "wrong" one. I can't believe some Mercedes dealer put in the wrong part, and the spark plug is black?! Please advise guys, thanks..
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85 300CD Signal Red/Tan sold 83 300D Manganese Brown 109K 97 E420 Midnight Blue 197K sold 98 BMW 328i Vert White 100K, sold 95 BMW 525i White 125K, sold 93 BMW 525iT Red 193K, sold 95 E320 Green Wagon 125K, sold 94 E320 White 127K, sold 85 300SD 156K Grey (Annie), sold 84 300D Lapis Blue 170K (Judy), sold 99 ML 320 Black (lease), 1998 C230 White (lease) 00 Honda S2000 Red (lease) 86 Mercedes 300E (sold) 84 Porsche 911 Red (sold), 1965 Porsche 911 White (sold) 
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#2
07-01-2003, 09:39 PM
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Are any coils Blue???
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#3
07-01-2003, 10:22 PM
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The two on each end are rounded with a blue sticker with part#
0 221 506 444 000 158 70 03 ZS 004 The one in the middle is a flat block with a black sticker with part# 0 221 506 002 A 000 158 75 03 ZS 0004 Strange, isn't it...thanks for your help, Arthur.
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#4
07-01-2003, 10:39 PM
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I read a post [ I think a Gilly post] that stated the Blue sticker coils were troublesome..
So , maybe they changed the center one . Gilly may see this... Anyway, check the other plug from that coil... these coils feed 2 plugs and they are in series , so if one acts up, it can affect the other [ if it is the last in the series].... I would expect to see both plugs showing fouling if it is the coil...
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#6
07-02-2003, 03:25 PM
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#7
07-02-2003, 03:50 PM
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All 104 w/dist-less list the 000 158 70 03 as correct
I don't see any 75-03 for 104, although the part is a listed part I think you may have had a bad oem Blue coil and they changed it out w/wrong part#.. Fastlane list a Bosch coil ..[ $65] What did they finally replace it with ?? [ make/part#]
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#8
07-02-2003, 06:37 PM
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The black one is a Bosch part but not for my 94 E320. The MB parts managers said it listed that part for a multitude of 104 engines. Now that I changed the spark plug resistors and the 3 spark plugs, the engine runs fine for the last day without the CE light coming on. Now should I leave this coil in or replace it with the proper coil. Should I bother to change the other 3 sprk plugs? I got the car going into MB to replace the EGR valve on the recall at their cost. Many thanks, Arthur.
On second thought, I think I will change that coil as the 2 plugs for that coil were fouled...and change the other 3 plugs as they are so cheap. I know this area can be problematic so I'll do the right thing.
__________________
85 300CD Signal Red/Tan sold 83 300D Manganese Brown 109K 97 E420 Midnight Blue 197K sold 98 BMW 328i Vert White 100K, sold 95 BMW 525i White 125K, sold 93 BMW 525iT Red 193K, sold 95 E320 Green Wagon 125K, sold 94 E320 White 127K, sold 85 300SD 156K Grey (Annie), sold 84 300D Lapis Blue 170K (Judy), sold 99 ML 320 Black (lease), 1998 C230 White (lease) 00 Honda S2000 Red (lease) 86 Mercedes 300E (sold) 84 Porsche 911 Red (sold), 1965 Porsche 911 White (sold)
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