S-Class (W221) 2007-2013: S 320 CDI, S 350, S 450, S 500, S 550, S 420 CDI, S 600

wrong Jumpstart

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Old 08-12-2016, 05:51 AM
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w221 S63 2008, w221 s550 2008, w211 e200 2004, w210 1999 e320, w123 200
wrong Jumpstart

Hi,
My w221 2007 wont start, I tried to jump-start it and it went well but yesterday I wrongly connected the cables, I noticed the fuse (20A) was blown up, I had I new one and connected the car in the way then i tried to start it again and it kept blowing up the fuse again and again,-NOW IT WONT START-
any help please
Old 08-12-2016, 09:08 AM
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2015 S550
Originally Posted by Hekkie Smith
Hi,
My w221 2007 wont start, I tried to jump-start it and it went well but yesterday I wrongly connected the cables, I noticed the fuse (20A) was blown up, I had I new one and connected the car in the way then i tried to start it again and it kept blowing up the fuse again and again,-NOW IT WONT START-
any help please
Have your starter battery tested. Replace if needed.
Old 08-12-2016, 11:39 AM
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w221 S63 2008, w221 s550 2008, w211 e200 2004, w210 1999 e320, w123 200
I've replaced the battery, bu I am afraid that I have short circuit because the fuse keeps blowing up,
any help please
and I checked the fuse box nest to the battery its fine nothing blown up or broken inside
Old 08-12-2016, 11:57 AM
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You are generally screwed. Every reverse jump start I have seen resulted in a few and expensive components ending up dead. For starters you probably lost your front (maybe rear too) SAM as well as possibly your drive authorization and ecu. Starter relay. And it goes on.

A star reading will point some of the casualties. Others will have to be found via trial and error.

Good luck...
Old 08-12-2016, 01:26 PM
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w221 S63 2008, w221 s550 2008, w211 e200 2004, w210 1999 e320, w123 200
do I need c5 star to check the car ?
why does it keep blowing the fuse?
and the car has everything working (everything) except starting the engine
Old 08-12-2016, 02:26 PM
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Yes
See my previous post
Ok
Old 08-12-2016, 02:41 PM
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w221 S63 2008, w221 s550 2008, w211 e200 2004, w210 1999 e320, w123 200
ok
thanks
Old 08-12-2016, 02:41 PM
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w221 S63 2008, w221 s550 2008, w211 e200 2004, w210 1999 e320, w123 200
appreciated
Old 08-13-2016, 11:45 AM
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2007 Mercedes S600
Originally Posted by alx
You are generally screwed. Every reverse jump start I have seen resulted in a few and expensive components ending up dead. For starters you probably lost your front (maybe rear too) SAM as well as possibly your drive authorization and ecu. Starter relay. And it goes on.

A star reading will point some of the casualties. Others will have to be found via trial and error.

Good luck...
+1, the problem with reverse jumping a car (especially one as complex as these) is that you run voltage through a bunch of computers and components backwards and they're not built for that. I hope it's not as bad as I think it is, good luck either way.
Old 08-13-2016, 02:56 PM
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w221 S63 2008, w221 s550 2008, w211 e200 2004, w210 1999 e320, w123 200
I sent to a mechanic and he's been testing since 5 hours
I dont know whats he gonna find tomorrow
I'll tell you then
thanks all
Old 08-14-2016, 01:49 PM
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11 S550 4MATIC
Originally Posted by Hekkie Smith
I sent to a mechanic and he's been testing since 5 hours
I dont know whats he gonna find tomorrow
I'll tell you then
thanks all
Any updates?
Old 08-14-2016, 02:15 PM
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w221 S63 2008, w221 s550 2008, w211 e200 2004, w210 1999 e320, w123 200
sadly no,
even the mechanic is not accepting my phone calls
but a friend told me I should disconnect the alternator
what do you think?
Old 08-14-2016, 03:36 PM
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Your car is not starting. Given a strong battery your alternator is probably not an issue...
Old 08-14-2016, 03:58 PM
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w221 S63 2008, w221 s550 2008, w211 e200 2004, w210 1999 e320, w123 200
the car has wiring harness we don't know where,
the mechanic checked the rear and front SAM and they are OK.
tomorrow I'll take the car back and send it from Dubai to Jordan to have fixed there.
Old 08-14-2016, 04:00 PM
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w221 S63 2008, w221 s550 2008, w211 e200 2004, w210 1999 e320, w123 200
and the car is'nt cranking too

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