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

Check engine light will not turn on

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Old 08-16-2023, 09:54 PM
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txc
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1993 400sel w140
Check engine light will not turn on

I'm a new owner of a 1993 400sel. The check engine light does not illuminate at all. I checked the bulb and it looks good. I also switched it with another working bulb and still nothing.

Could this be an issue with the cluster or a different problem? Thanks.

Old 08-17-2023, 05:38 AM
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2015 E400 Sedan
fuse???
Old 08-17-2023, 10:01 AM
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1993 400sel w140
Originally Posted by ygmn
fuse???

where is the fuse? I pulled all the bulbs didn’t find a fuse.



Last edited by txc; 08-17-2023 at 02:10 PM.
Old 08-18-2023, 04:50 AM
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2015 E400 Sedan
underhood or dashboard maybe?
I am guessing

but looks like your board is burnt?
maybe flip it and check for broken solder joints?

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