im going crazy with this car. ecm wont communicate with ANYTHING in the car.
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C300 15
im going crazy with this car. ecm wont communicate with ANYTHING in the car.
foxwell scanner reads .1 ah on battery registration, which takes a second to do. im told its supposed to be minutes. no dealership will work on it. this all started happening after I had two dip****s change my oil pan. they disconnected the battery and **** went to hell.
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C300 15
im not sure what any of this is. but if anyone with xentry has it message me.
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The main thread talks about the V1.0 (version 1.0), the V2.0 is what has all the coding and features.
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C300 15
XENTRY is MB's official diagnostic tool, the same tool that MB dealership uses, the other scanner is this thing: https://mbworld.org/forums/e-class-w...l-more-19.html
The main thread talks about the V1.0 (version 1.0), the V2.0 is what has all the coding and features.
The main thread talks about the V1.0 (version 1.0), the V2.0 is what has all the coding and features.
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Without knowing what code is stored in the car it will be difficult to know what the problem is, as for getting XENTRY, there are variety of options and since I have no experience with either, I won't link any, you can look for banners on various forums or other threads that talks about that, sorry about that.
That said, if all you need is the scanner: https://mbworld.org/forums/e-class-w...onal-more.html
That said, if all you need is the scanner: https://mbworld.org/forums/e-class-w...onal-more.html
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C300 15
Without knowing what code is stored in the car it will be difficult to know what the problem is, as for getting XENTRY, there are variety of options and since I have no experience with either, I won't link any, you can look for banners on various forums or other threads that talks about that, sorry about that.
That said, if all you need is the scanner: https://mbworld.org/forums/e-class-w...onal-more.html
That said, if all you need is the scanner: https://mbworld.org/forums/e-class-w...onal-more.html
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C300 15
its at my house. dealerships wont do it. my foxwell scanner doesnt work, says no communication eith the battery management system, and doing front sam it said its was instantly registered, but isnt.
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Did you confirm the battery itself is good? New batteries can be defective, I recommend trying to get it tested at AutoZone or similar, they might be able to register the battery for you.
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From: Orange County, CA
08 E350
I meant more of a geographic location. What about independent shops in the area?
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W213 All-terrain
Why do you consider that the battery needs to be "registered"?
As you may easily find out, the U codes are not Fault Codes.
Last edited by trigital; May 19, 2026 at 12:59 PM.
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C300 15
every warning light is, almost every system. u series codes other series codes. I have no clue how. changing an oil pan could have caused thia. is the ecu down? and yeah the w205 does require a reset. when i ran my foxwell on it, it basically had almost all system not communicating. What on earth could cause that?
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every warning light is, almost every system. u series codes other series codes. I have no clue how. changing an oil pan could have caused thia. is the ecu down? and yeah the w205 does require a reset. when i ran my foxwell on it, it basically had almost all system not communicating. What on earth could cause that?
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2018 C300 Sedan
every warning light is, almost every system. u series codes other series codes. I have no clue how. changing an oil pan could have caused thia. is the ecu down? and yeah the w205 does require a reset. when i ran my foxwell on it, it basically had almost all system not communicating. What on earth could cause that?
If you can't communicate at all with a scanner, I'd be suspicious of ECM damage or another module bringing down the CAN bus. You're going to need a shop that knows Mercedes well or a dealer.
Last edited by jeboo; May 21, 2026 at 07:13 PM.
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C300 15
its a new scanner to the car. and two mechanics worked on it for.oil pan, not specialists but the arent stupid, I doubt they did that. i have a specialist in can see in 3 weeks. foxwell.did email back, and said go t o service functions then battery. but the specialist tells me its not the battery. I also had a previous mechanic tell me this, that it might be the ecm as well
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C300 15
You mentioned the battery was disconnected for the repair, any chance it was removed and potentially installed with the terminals reversed? That could potentially cause significant electrical damage to the ECM/modules.
If you can't communicate at all with a scanner, I'd be suspicious of ECM damage or another module bringing down the CAN bus. You're going to need a shop that knows Mercedes well or a dealer.
If you can't communicate at all with a scanner, I'd be suspicious of ECM damage or another module bringing down the CAN bus. You're going to need a shop that knows Mercedes well or a dealer.
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As you may know, the starter was troubling the mechanics that changed the oil pan, so maybe loose screws for cables and connectors, also worth to mention the big Ground cable that connects the engine to the chassis, everything under the car in the proximity of the oil pan.
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C300 15
As you may know, the starter was troubling the mechanics that changed the oil pan, so maybe loose screws for cables and connectors, also worth to mention the big Ground cable that connects the engine to the chassis, everything under the car in the proximity of the oil pan.
