S-Class (W140) 1991-1999: 300 SD, S 350TD, 300 SE 2.8, S280, 300 SE 3.2, 300 SEL 3.2, S320, S320L, 400 SE, S420, 400 SEL, S420L, 500 SE, S500, 500 SEL, S500L, 600 SE, S600, 600 SEL, S600L, 500 SEC, 600 SEC

Is the wiring harness interchangeable s420/500?

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Old 07-15-2015, 06:27 PM
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2003 SL500
Is the wiring harness interchangeable s420/500?

For a 1995 s420, is the harness the same as a s500? Also, does this car use OBDII or not yet?

Thanks for any help
Old 07-16-2015, 09:05 AM
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1997 Mercedes S420
I would suggest that the wiring loom part numbers should be compared to determine if they are the same or not. BTW, gorgeous cars!
Old 07-17-2015, 03:41 AM
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2003 SL500
Thanks PN, I was told by an eBay vendor who claims to have a lot of experience that the harness' are indeed interchangeable.

The engine is the same except for bore size and computer, all wire connections are the same.

For what it's worth

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