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E-Class (W124) 1984-1995: E 260, E 300, E 320, E 420, E 500 (Includes CE, T, TD models)

Are these correct plugs: Bosch 4504 PLATINUM IR FUSION for M103 3.0

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Old 01-25-2021, 11:48 PM
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1987 300E, 1976 280C
Exclamation Are these correct plugs: Bosch 4504 PLATINUM IR FUSION for M103 3.0
My local dealer was out of F8DC4 spark plugs and they insisted Bosch 4504 will work just fine. They are Bosch Platinum IR Fusion 4504 and were much cheaper... worrying... Changing my wires, rotor and distributor on my 3.0 M103 on the 1987 300E. Please leave your thoughts. Thanks!
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Old 01-26-2021, 01:09 PM
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02w163ML500 / 97w210E50AMG / 99w202C230k / 95w124500e-wip
Originally Posted by Dexter88
My local dealer was out of F8DC4 spark plugs and they insisted Bosch 4504 will work just fine. They are Bosch Platinum IR Fusion 4504 and were much cheaper... worrying... Changing my wires, rotor and distributor on my 3.0 M103 on the 1987 300E. Please leave your thoughts. Thanks!
Another SP thread....
Search top right corner.... Google.....whatever....Spark plugs
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Old 02-04-2021, 07:56 AM
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mercedes w123 260e
Only resistor less spark plugs in the M103 ,,stick to NGK or BOSCH or BERU i use Beru in my M103 engine .
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Old 02-07-2021, 09:25 AM
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Stick with the old Bosch Super spark plugs. The old engines don't like the newer fandangle tipped plugs
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Old 02-09-2021, 06:13 AM
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mercedes w123 260e
The wrong typeof plug can cause other problem in the electronic system, that will fail in a short time
Last edited by Trevor Hadley; 02-20-2021 at 05:10 AM.
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Old 03-01-2021, 09:26 AM
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mercedes w123 260e
Drop all spark plugs rthat have a letter R in it .
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Old 05-31-2021, 11:11 PM
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1987 2.6l w124
Does anyone have a source for non-resistor plugs? Bosch doesn't even make the ones recommended for my 1987 260E. Haven't found a replacement yet.
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