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

ECU help

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Old Sep 26, 2013 | 04:08 PM
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BigBoyToyS420's Avatar
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1997 Mersedes S420
ECU help

I think my ECU is bad is it a way to check? I was thinking about just buying a used on any advise on it MB family?
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Old Sep 28, 2013 | 06:22 AM
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oldsinner111's Avatar
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From: tennessee
s320
I haven't heard of them going bad on 96 and up vehicles.The ones that did on 95 and below were from wires shorting out in the bad wiring harness.
Ebay motors though has alot of computers for sale,I would try them and Ebay U.K. also.Now there are fuses that can blow in the ECU.Remove coffin like lid on passenger side.Look at panels for blowed fuses.
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