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SL500 misfire 😥

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Old May 29, 2018 | 04:03 PM
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Ecospeed's Avatar
Ecospeed
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Merc SL500
SL500 misfire 😥
I need some serious help here people. Please.

I've converted my SL350 2004
to a SL500 everything runs fine except every time I put my foot down I get the dtcs below.
Front cats have been removed as they were blocked. I've changed the spark plugs and coils.
Still no joy.
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Old May 30, 2018 | 02:21 AM
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Ecospeed
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Merc SL500
Change back to what? The 3.7? No thanks.
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Old May 30, 2018 | 11:33 AM
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benzdiyer
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From: Northern VA
07 CLK550
I had a similar issue with my CLK550... It ended up being bad camshaft magnet solenoids and an alternator producing high voltage.

-Freddy
Last edited by benzdiyer; May 30, 2018 at 11:34 AM. Reason: typo
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