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My eco has stopped working on a 2016 c250d. The display show the yellow circle A with a line through it. It is switched on. Am I right in thinking the the display showing mph and another which goes green and says charge has to do with charging the battery to power eco. This charge graph only goes green sometimes mostly sits in white as if not charging.
Hi guys, I had the same problem ie auxiliary battery malfunction ... took it to MB dealership they changed this battery. Battery + Labor cost me around 400 usd
This part has yet again been superseded according to parts .com, original No. A 205 440 00 73, then A 205 905 280 9 then A 205 905 34 73 currently A 205905341480 (the A and the spaces are not reqd to search). A cynical person might think that there was an inherent problem with this component, I wonder if MB think the same and offer some support : )
My vehicle was 2 weeks out of warranty when I got the aux battery malfunction, haven’t got a quote from the dealer service dept yet but a local parts supplier wants $500 Aust + tax just for the component. Parts.com have it for $117 US but they don’t accept foreign credit cards or ship overseas.
It seems to have absolutely no affect on the operation of the vehicle except for the annoying warning message, does anyone know what this component actually does?
This part has yet again been superseded according to parts .com, original No. A 205 440 00 73, then A 205 905 280 9 then A 205 905 34 73 currently A 205905341480 (the A and the spaces are not reqd to search). A cynical person might think that there was an inherent problem with this component, I wonder if MB think the same and offer some support : )
My vehicle was 2 weeks out of warranty when I got the aux battery malfunction, haven’t got a quote from the dealer service dept yet but a local parts supplier wants $500 Aust + tax just for the component. Parts.com have it for $117 US but they don’t accept foreign credit cards or ship overseas.
It seems to have absolutely no affect on the operation of the vehicle except for the annoying warning message, does anyone know what this component actually does?
you are right my car was working perfectly fine despite the auxiliary battery malfunction. I understood it is not an actual battery but a voltage converter. i really dont know what it does. wait to see the MB dealer quote the all in cost for me was little less then 400 usd.
Got the "Auxiliary Battery Malfunction" yesterday on my 2015 C300. Only have 10,500 miles on it. Brought into dealer this AM and they changed the voltage converter under warranty.
Part number 205-905-34-14-80
Service ticket says: aux battery has excessive resistance
code B1F4500
Test drove car. Performed Short Test. Removed pass side lower dash panel. Replaced aux battery. Cleared code.
So far so good.
Got the "Auxiliary Battery Malfunction" yesterday on my 2015 C300. Only have 10,500 miles on it. Brought into dealer this AM and they changed the voltage converter under warranty.
Part number 205-905-34-14-80
Service ticket says: aux battery has excessive resistance
code B1F4500
Test drove car. Performed Short Test. Removed pass side lower dash panel. Replaced aux battery. Cleared code.
So far so good.
I wonder why the part number you posted a remanufactued part.
I wonder why the part number you posted a re-manufactured part.
Just curious...why do you think that part number specifically designates it is a remanufactured part?. It is the Mercedes part number that replaced part number 205-905-34-14.
Yes you can get that part that remanufactured and the sellers of remanufactured parts will of course list by the appropriate part number but will say remanufactured. I am not aware of Mercedes having using/making refurbished parts and having special refurbished part numbers designating them. If you do a search on that part number you will see some listings saying OEM while others will state remanufactured or refurbished.
Would like to know with evidence that I am wrong and as I will go back to the dealer if you are correct!
Got the "Auxiliary Battery Malfunction" last week on my 2015 C300.
Dealer replaced the Capacitor under warranty, today.
Part number 205-905-34-14-80 - Reman Voltage Conv. Service ticket says: Code present for buffer battery has a malfunction. Removed and replaced Capacitor (54-1183)
CORRECT procedure is to disconnect main battery - which is easy - and remember that part has a charge left in it so be careful even with battery disconnected
Well I bought the new updated part, think it's the fourth updated part, it was straight forward to replace, although the carpet was a bit of a handful to move, I had to remove the side plastic sill trim and fuse cover to get the carpet pulled away to get to the voltage regulator, when fitted and all parts refitted, the warning message has gone but the 'A' still does not go solid, and the stop start does not work. Does it need a good run to charge the capacitors that start the car when using the eco stop start? If so how far. Thanks for all your help lads.
Thanks to everyone for the input in this thread so far.
Given that there are multiple part numbers available for the W205 voltage regulator, does anyone know or have an opinion on which one is the best to use?
Would this method also work on A180 model? My car won't start althought it has power.. it's like it's not receiveing fuel and i had the auxiliary battery failure message two days ago
you are right my car was working perfectly fine despite the auxiliary battery malfunction. I understood it is not an actual battery but a voltage converter. i really dont know what it does. wait to see the MB dealer quote the all in cost for me was little less then 400 usd.
ALLOW ME TO PLS APOLOGIZE before being told off. But I can not seem to find the answer. If anyone can please show or give me instructions on where I'm able to find the voltage converter for my x164 of 2010 Gl450. I would be forever grateful.
I did make a post a thread for my aux battery malfunction but no takers...even after I replaced it with a genuine aux battery the sign remains. Sorry and thank you!
Thanks tworiversuk
did your stop start function ever start working again ?
Since fitting a remanufactured voltage converter my stop start has not worked over the Australian winter and I thought that maybe it’s just because the battery was low, but the other morning it started working again for a short time during a foggy dark morning with all the lights and wipers going so now I’m not so sure about the low battery voltage theory. I don’t miss the engine stopping as such but I also don’t like the thought that the system still has a malfunction
Regards
Greg
ALLOW ME TO PLS APOLOGIZE before being told off. But I can not seem to find the answer. If anyone can please show or give me instructions on where I'm able to find the voltage converter for my x164 of 2010 Gl450. I would be forever grateful.
I did make a post a thread for my aux battery malfunction but no takers...even after I replaced it with a genuine aux battery the sign remains. Sorry and thank you!
You are in the wrong place my friend. This is the W205 C-class forum. Follow the link to the X164 forum.
ALLOW ME TO PLS APOLOGIZE before being told off. But I can not seem to find the answer. If anyone can please show or give me instructions on where I'm able to find the voltage converter for my x164 of 2010 Gl450. I would be forever grateful.
I did make a post a thread for my aux battery malfunction but no takers...even after I replaced it with a genuine aux battery the sign remains. Sorry and thank you!
W206 C300e AMG Line Premium Plus with driver assistance package
Originally Posted by John Mocali
Hello, considering the number of complaints you find in the different forums one might think that the product is defective!
First models were shipped with a voltage converter with part no. A 205 440 00 73. Such model has been replaced by a new part no. A2059052809.
I got mine changed less than a week ago. For those interested in what happens to your voltage converter there you go:
That capacitor on the bottom left looks like it has leaked. Quite a common failure for these components if they are poor quality, stressed or get too hot. I would be seriously tempted to recondition it by replacing the capacitors as that would be way cheaper. When someone takes theirs our I would appreciate a photo showing the values (uF) and voltage rating and I can see how much the parts would cost.
That capacitor on the bottom left looks like it has leaked. Quite a common failure for these components if they are poor quality, stressed or get too hot. I would be seriously tempted to recondition it by replacing the capacitors as that would be way cheaper. When someone takes theirs our I would appreciate a photo showing the values (uF) and voltage rating and I can see how much the parts would cost.
Can you please point out, if possible, where is the capacitor located? I'm trying to locate mine because even after the aux and main battery replacement I'm still getting "aux battery malfunctioned". Both batteries were producted 2009. And I have a 2010 Gl 450 (production Oct 2010). I been told it's my capacitor.
W206 C300e AMG Line Premium Plus with driver assistance package
The capacitor is the same as the voltage converter and its location is mentioned earlier. There seems to be some confusion as some models have a 2nd physical battery.
I would take out the voltage converter anyway and inspect it. Any bulging or leaking from the large cylindrical components (the capacitors) and it has definitely failed or is about to.
Capacitors are like batteries but are capable of producing much higher currents. It makes sense in a stop-start system as it will enable the starter motor to start the engine much easier without it becoming sluggish as the main battery starts to age. It also won't wear out the main battery as much. They don't store as much charge for their physical size though so without a large main battery or an auxiliary battery you wont get as many stop-starts before the system is disabled to let the main battery charge up.
I wouldn't be surprised if the aux battery is only found in models with larger engines. The higher starting currents would require a bigger battery and at some point space and weight requirements mean two batteries are a better option.
this is a DIY procedure for sure, I just finished changing mine. I have a W205 C300 2015 and the auxiliary battery malfunction message came up about 2 months ago. I was told by the Mercedes benz technician that it was not critical. The repair is covered under warranty, however I'm not able to take it to the dealer so I decided to purchase the spare part online (parts.com) for $104 with shipping included.
I went ahead and did it in about 35 min. the steps are:
1. Remove the cover under the glove compartment, this is a single screw and 2 clips
2. There are 2 cables attached to the cover (bulbs) so you have to disconnect both cables.
3. Pull back the carpet (carefully), it will be hard but the foam behind the carpet can be twisted without any issues
4. there will be a plastic cover with 3 nuts, you have to take them out and remove the plastic cover. You will see the voltage converter right there, which will be attached to the metal piece by a clip and a screw. Carefully remove the nut (Carefully and slowly). and just unplug the converter and replace with the new one and follow the same procedure in reverse.
Be careful with the tools as there are many DC cables under that carpet, so you can easily create a mess if you are not pretty careful.
I did not take any pictures with the details, but it is the same as the one posted earlier here
If you have any questions on this particular one just let me know
Regards
Hello everyone new pics attached, ok so pulled back the carpet and the side trim. I could not find any capacitor or fuse boxes on my GL 450 at that location.
However, there were two fuse locations which I checked each and every fuse; located in engine bay and under passenger seat which is where the main & aux battery is loacted-- all fuses worked. Still in search of that darn capacitor on this x164.
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