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I was stuck in a traffic jam for over 2 hours under 110 F in…

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Hello, I was stuck in...
Hello, I was stuck in a traffic jam for over 2 hours under 110 F in Fl. (08 C300)
Sundenly all lights went on on the dash, AC shut off and speedo digital needed stop acting, gauge and temp where working.
It kept running until I got home, I shut it off the engine.Now no start just light no crank.
I replaced the existing battery by a brand new 700CCA as prescribed, but same story.
I checked all fuses all are good…Is the battery proble, may have caused the computer to shut down? or ..?
Submitted: 8 months ago.Category: Mercedes
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Answered in 1 hour by:
11/19/2017
Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 8 months ago
Lou P. master tech
Lou P. master tech, Mercedes Technician
Category: Mercedes
Satisfied Customers: 6,089
Experience: 20 years Master Certified excellent fix rate and have access to factory wiring, and instructions.
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Hello my name is***** am going over your request now and will reply back soon with some info OR a few questions that would help me better determine how to help you. Keep in mind I have no idea of your technical ability or what you do and do not already know. So the more info you can tell me the better. I have been on the site for almost ten years and have oustanding 5 star ratings so trust that I will do everything I can to get you taken care of, Lou
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Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 8 months ago
This sounds to me like a relay failed in the left front fuse box . This or the power was shut off by the rear sam module, the only ways to tell what is going on is
1-use a test light and with the key ON test each fuse for 2 things 1(make sure the fuses are not blown) and 2(make sure each fuse has power and report back the ones that do not so i can trace the system and see where power flows from)
And
2- we need a mercedes capable scan tool to read the codes to see if its a possible communication system issue . Hope this helps
Please take a second and click the stars at the top of the screen to rate my service so I may receive my credit for helping, 5 STARS is ideal. Please request me in the future! Keep in mind that when you rate it does NOT end our conversation, you can still return here to me for follow up information if needed just simply reply back, THANKS! Lou P Master Mercedes-Benz Tech Master ASE Certified
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Customer reply replied 8 months ago
I tried a regular scanner, it say no link ! Can’t read it.I check the starting relay work when i make physical contact the starter kick in, but nothing else. The other relays seems good.
All fuses tested all are good
Customer reply replied 8 months ago
It seems that no power is getting to the starter relay to initiate the fuel injection and get going ...
Customer reply replied 8 months ago
Question ; could this have been caused by a week battery to shut down the system, and now the computer would need flashed to be reset?
Customer reply replied 8 months ago
Sorry “weak “ battery...
Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 8 months ago

ok sorry for the delay, I am reading over your responses now

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Customer reply replied 8 months ago
I see, I will check when back as I left the Car home, will be back Tuesday. I let you know, thanks again.
Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 8 months ago

ok, no problem.

have a good night.

Lou

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Customer reply replied 8 months ago
Too Lou, Tks
Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 8 months ago

:)

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Customer reply replied 7 months ago
Hi Lou, what has been noticed there is water under the driver seat, i think that create this situation.
What now?
Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 7 months ago

perfect, not for you sorry but at least for the issue at hand.

so water is causing a short of the data system, the data lines are in the left and right rocker panels where the door sills are at.

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Customer reply replied 7 months ago
That’s would explain it, what to do in that case ? Dry it up? Could it have cause some irreversible damages?
Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 7 months ago

eh, usually just shorts wires as far as causes data loss , havent seen anything where it causes irreversible repair usually can clean with electronics cleaner if there is corrosion present.

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Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 7 months ago

here are all the data line connections.

f748d063-1c69-4c10-b58c-...PNGf748d06...PNGc259be0f-a758-4ecf-9d64-...PNGc259be0...PNG77ec0e77-9c93-4b00-8780-...PNG77ec0e7...PNG57b3c94d-4dc0-4848-b036-...PNG57b3c94...PNG83545b99-2e8c-4f6c-b3e0-...PNG83545b9...PNGa28a1103-a922-4a83-80c1-...PNGa28a110...PNG
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Customer reply replied 7 months ago
I can’t open because on a phone in vacation. But I will be back this week end and work on it. Will be in touch .
Best
Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 7 months ago

ok, sounds good, have a safe trip .

Lou

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Customer reply replied 7 months ago
Thanks again Lou
Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 7 months ago

no problem.

have a good holiday if you are celebrating .

and if not, have a good looooooooong weekend :)

Lou

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Customer reply replied 7 months ago
you too Lou, thanks so much
Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 7 months ago

:)

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