Wrong battery terminal connection, now No power
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E400 W207 C320 W203
Wrong battery terminal connection, now No power
Darn it!..The guy working on my W207 E400 was trying to jump start the car and "accidentally" clamped (actually, just touched) the Positive and Negative cables incorrectly. Pos to neg and Neg to pos. No there is ZERO power. Not even on the instrument cluster. Nothing. The car won't even accept power with a new battery. Is there a fuse that is designed to blow when the battery terminals are connected incorrectly? Like a Powertrain fuse? He said he checked the prefuse box and all fuses were fine and the pyrofuse on the positive battery cable is fine.
Last edited by Paul Shalom; Aug 16, 2020 at 01:52 PM.
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E400 W207 C320 W203
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From: Sydney
2015 E400 Coupe
i would say you were up for several thousand dollars in Electronics. I had a BMW motorbike that the apprentice service technician did that to and the fix was $3,300. Obviously I did not have to pay it.
good luck Paul and let us know how it works out.
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E400 W207 C320 W203
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From: Austin, TX
2013 SL550 BiTurbo
You come here posting, asking for help, people tell you what you don't want to hear and you discount the very help you asked for by calling everyone "ridiculous"
The problem is you (or your choice in mechanics, anyway) have more than likely totalled the car. Hooking up that much voltage and amperage backwards is deadly to your car's computers.
Again, good luck, and I hope you have full coverage...
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E400 W207 C320 W203
what's helpful is not hooking up your jumper leads reversed and destroying all your computers on the car.
You come here posting, asking for help, people tell you what you don't want to hear and you discount the very help you asked for by calling everyone "ridiculous"
The problem is you (or your choice in mechanics, anyway) have more than likely totalled the car. Hooking up that much voltage and amperage backwards is deadly to your car's computers.
Again, good luck, and I hope you have full coverage...
You come here posting, asking for help, people tell you what you don't want to hear and you discount the very help you asked for by calling everyone "ridiculous"
The problem is you (or your choice in mechanics, anyway) have more than likely totalled the car. Hooking up that much voltage and amperage backwards is deadly to your car's computers.
Again, good luck, and I hope you have full coverage...
. Yeah, they are great electricians
. I'll pass on your pessimistic brand of "help" Sir. We Haven't had time to tackled it since that day. We'll have this car up and running today hopefully. I'll be sure to post what the solution was. Hopefully this will assist you in re-evaluating how useful your kind of "help" is.
Last edited by Paul Shalom; Aug 16, 2020 at 02:57 PM.
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E400 W207 C320 W203
.
Last edited by Paul Shalom; Aug 16, 2020 at 01:46 PM.
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2012 E550 Cabrio
No. I think it’s probably cos you’re managing to sound like an arrogant know it all in the same thread where you posted asking for help cos neither you nor your “mechanic” knew what you were doing. The only guy here who ****ed up his car like this has somehow managed to convince himself he’s still the smartest guy in the room.
yup. That’s it.
yup. That’s it.
Last edited by 604 C63; Aug 16, 2020 at 01:52 PM.
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E400 W207 C320 W203
Arrogant?? Because I refuse to accept "call a lawyer" as a feasible fix?...LOL. Hey... Happy melancholy trolling, Man. Live the fantasy. Now if you'll excuse me, I'm working.
Last edited by Paul Shalom; Aug 16, 2020 at 01:59 PM.
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I'm glad you're optimistic about it but I'd be scared to death. Many cars have one big fuse between the batt and everything except the starter and Alt, but I don't see how reverse polarity would pop it. Imo it should have a diode to force pop that fuse, or one to protect the rest of the car, but I've never see one either way. My guess would be cost. If it's only a problem when an end user screws upthen why spend $ to prevent it?
This is one of two reasons they say always put the neg clamp somewhere else, like on the body/frame, not the batt. Most people don't understand how it all works, and those that do may be in a hurry and/or distracted, so neg to the body is pretty hard to screw up.
The other reason is H2, which I have a forever dent in my nose from when a batt detonated. I wasn't doing that btw, I was simply checking water level but somehow it went boom and I'm still baffled as to how. Maybe a wee little short inside that was just waiting for a little O2, which I provided. Almost forgot; it also covered me in a mist of acid. So I suggest wearing safety glasses when checking water, and now I blow on it first to get the H2 outta there as best I can. Eyes are way too valuable to take chances with and I was only about inch away from losing one that day....
This is one of two reasons they say always put the neg clamp somewhere else, like on the body/frame, not the batt. Most people don't understand how it all works, and those that do may be in a hurry and/or distracted, so neg to the body is pretty hard to screw up.
The other reason is H2, which I have a forever dent in my nose from when a batt detonated. I wasn't doing that btw, I was simply checking water level but somehow it went boom and I'm still baffled as to how. Maybe a wee little short inside that was just waiting for a little O2, which I provided. Almost forgot; it also covered me in a mist of acid. So I suggest wearing safety glasses when checking water, and now I blow on it first to get the H2 outta there as best I can. Eyes are way too valuable to take chances with and I was only about inch away from losing one that day....
Thread Starter
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Joined: Feb 2014
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E400 W207 C320 W203
I'm glad you're optimistic about it but I'd be scared to death. Many cars have one big fuse between the batt and everything except the starter and Alt, but I don't see how reverse polarity would pop it. Imo it should have a diode to force pop that fuse, or one to protect the rest of the car, but I've never see one either way. My guess would be cost. If it's only a problem when an end user screws upthen why spend $ to prevent it?
This is one of two reasons they say always put the neg clamp somewhere else, like on the body/frame, not the batt. Most people don't understand how it all works, and those that do may be in a hurry and/or distracted, so neg to the body is pretty hard to screw up.
The other reason is H2, which I have a forever dent in my nose from when a batt detonated. I wasn't doing that btw, I was simply checking water level but somehow it went boom and I'm still baffled as to how. Maybe a wee little short inside that was just waiting for a little O2, which I provided. Almost forgot; it also covered me in a mist of acid. So I suggest wearing safety glasses when checking water, and now I blow on it first to get the H2 outta there as best I can. Eyes are way too valuable to take chances with and I was only about inch away from losing one that day....
This is one of two reasons they say always put the neg clamp somewhere else, like on the body/frame, not the batt. Most people don't understand how it all works, and those that do may be in a hurry and/or distracted, so neg to the body is pretty hard to screw up.
The other reason is H2, which I have a forever dent in my nose from when a batt detonated. I wasn't doing that btw, I was simply checking water level but somehow it went boom and I'm still baffled as to how. Maybe a wee little short inside that was just waiting for a little O2, which I provided. Almost forgot; it also covered me in a mist of acid. So I suggest wearing safety glasses when checking water, and now I blow on it first to get the H2 outta there as best I can. Eyes are way too valuable to take chances with and I was only about inch away from losing one that day....
. So we're just going over all points step by step and checking all fuses first. Actually we're finished with that now and there was only one 5 amp fuse that was bad, number 59 in the trunk . A front distronic fuse. .Don't know if this was just blown or been like that.. We're putting back the prefuse box now and gonna give it a go. Stay tuned. If, you're interested in the concept, here's a video showing that safety prefuse in cheaper cars like fiat.
Last edited by Paul Shalom; Aug 16, 2020 at 03:51 PM.
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E400 W207 C320 W203
Solved.
The car is up and running now. After changing fuse 59 the car started right up. Ironic because it's a distronic fuse. I'm charging the battery up now. When it's fully charged, I'll pull fuse 59 again to be sure that's what the problem was. 2015 W207 E400. DE 30 LA M276 twin turbo engine.No lawyer or insurance agent needed either...
Last edited by Paul Shalom; Aug 20, 2020 at 10:46 AM.
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E400 W207 C320 W203
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Tell me what the problem was please i have same issue
LOL...That's even more ridiculous. To Mercedes' credit, a momentarily reversed battery connection will not "destroy all your computers on the car" and it's not the first time someone has done it. Not even in a Fiat which has a safety powertrain fuse that blows in this event. The "help" You're referring to is to call the lawyer and the insurance agent??.... Yeah, they are great electricians. I'll pass on your pessimistic brand of "help" Sir. We Haven't had time to tackled it since that day. We'll have this car up and running today hopefully. I'll be sure to post what the solution was. Hopefully this will assist you in re-evaluating how useful your kind of "help" is.
. Yeah, they are great electricians. I'll pass on your pessimistic brand of "help" Sir. We Haven't had time to tackled it since that day. We'll have this car up and running today hopefully. I'll be sure to post what the solution was. Hopefully this will assist you in re-evaluating how useful your kind of "help" is.
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E400 W207 C320 W203
