Need Help Abs, esp, srs faults
MBWorld Fanatic!
Joined: Oct 2011
Posts: 7,107
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From: Bronx, N.Y.
2002 ML 320 & 2006 ML500
There is a misconception about the function of the Auxiliary/Back-up Battery. Its' sole purpose is to provide enough voltage to the transmission locking pawl and gearshift selector, so one may move the selector lever into NEUTRAL so it may be towed if the main battery is dead.
MBWorld Fanatic!
Joined: Oct 2011
Posts: 7,107
Likes: 765
From: Bronx, N.Y.
2002 ML 320 & 2006 ML500
I found the battery spec on the site it says 92ah agm, i didnt check the back up i tested it when i changed the main battery and it was good, this morning i check the voltage before starting it and its between 12 and 12.2 so under 12.7. i put a trickle charger on it so i can take it to work and scan it and then take the battery out and go swap it.
Super Member
Joined: Jun 2014
Posts: 507
Likes: 25
From: Massachusetts
2014 Smart ForTwo Passion Cabrio
There is a misconception about the function of the Auxiliary/Back-up Battery. Its' sole purpose is to provide enough voltage to the transmission locking pawl and gearshift selector, so one may move the selector lever into NEUTRAL so it may be towed if the main battery is dead.
Super Member
Joined: Jun 2014
Posts: 507
Likes: 25
From: Massachusetts
2014 Smart ForTwo Passion Cabrio
No, no, I had one day of crystal clear clarity in 1979. I was in the Corps, near broke, and bought some MadDog 20/20. Little did I know... 30 minutes later I was doing a dead-on impression of the little girl in The Exorcist, pea soup and all. When you turn your head that far things get clear in a great big hurry. LOL!
(We now return you to the regularly scheduled broadcast...)
(We now return you to the regularly scheduled broadcast...)
MBWorld Fanatic!
Joined: Oct 2011
Posts: 7,107
Likes: 765
From: Bronx, N.Y.
2002 ML 320 & 2006 ML500
Super Member
Joined: Jun 2014
Posts: 507
Likes: 25
From: Massachusetts
2014 Smart ForTwo Passion Cabrio
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Thread Starter
Junior Member
Joined: Aug 2015
Posts: 51
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2011 ML350 Bluetec
hey guys so I took out the battery and tested it and it was good but i took it to the store anyway to get it changed, but the guy at the counter tested it also with their tester and it printed out a paper that said its still good his printed out 12.76v so they wouldn't change it for me, he told me to go damage it if i really wanted a new one, but the problem is the truck is not starting anymore this morning i tried to start it, and it cranked and stopped and now when i push the start button nothing happens it doesnt even attempt to start. my brother said maybe the rebuilt alternator is bad which is possible but shouldn't the truck still start with the battery?
Thread Starter
Junior Member
Joined: Aug 2015
Posts: 51
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2011 ML350 Bluetec
yeah yesterday morning it started fine. today before i went to go exchange the battery I tried to start it and it started cranking and stopped checked the voltage thru the cluster it said 12.2 , i tried again and it didn't do anything, i don't know what it could be, only other thing i can think off is the alternator but even with the bad one the truck always started it just had the red battery sign on the dash.
Thread Starter
Junior Member
Joined: Aug 2015
Posts: 51
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2011 ML350 Bluetec
i tried putting a booster pack on it to start it and it didnt start also the voltage reader on the cluster is at 11.9 and with the booster pack it didnt change, still at 11.9. i dont know whats wrong with it at the point i think maybe a fuse blew or something
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Junior Member
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2011 ML350 Bluetec
i got it started, its weird it wouldn't start nothing on the steering wheel was working the horn, the radio buttons, turn signal switch nothing and the wipers would go on once every couple seconds and
every time i turned the ignition on and off i would get a red light put in park or not in park but it was in park. so I pluged in my obd2 scanner and it wouldnt connect to the truck so while i was searching why online the little arrow on the P came back and i tried to start it and it worked. so i dont know i am thinking i need someone with the star computer to check it. maybe a module is bad or going bad?
every time i turned the ignition on and off i would get a red light put in park or not in park but it was in park. so I pluged in my obd2 scanner and it wouldnt connect to the truck so while i was searching why online the little arrow on the P came back and i tried to start it and it worked. so i dont know i am thinking i need someone with the star computer to check it. maybe a module is bad or going bad?
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Junior Member
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2011 ML350 Bluetec
I erased everything and restarted the truck and nothing came back on except the left inlet port and the other 2 codes that say disregard this fault on the first picture those 3 codes have been on since i got the truck back in march. after some searching i think the truck didnt start because it thought it wasent in park? thats the only thing i can think off.
Super Member
Joined: Jun 2014
Posts: 507
Likes: 25
From: Massachusetts
2014 Smart ForTwo Passion Cabrio
Did you clear all the errors before restarting the car and looking for error codes? The MB computer will store current AND historical fault codes. Here in Germany, for example, a prepurchase inspection includes downloading all the current and historical errors, printing them, then clearing them all out and running the check again to see which ones persist. When I had my US radio switched for an EU radio the computer knew everything that had been unplugged and plugged back in during the process. The errors were still there, just hadn't been cleared out.
If these codes and behavior were not there before the alternator was changed, you need to take it back to that shop and demand they troubleshoot and fix the problem. An alternator R&R does not cause these problems unless the mechanic is totally incompetent. If the problems were there before the alternator change, I would take the car to an MB dealer for trouble shooting and an estimate for repair WITH warranty.
If these codes and behavior were not there before the alternator was changed, you need to take it back to that shop and demand they troubleshoot and fix the problem. An alternator R&R does not cause these problems unless the mechanic is totally incompetent. If the problems were there before the alternator change, I would take the car to an MB dealer for trouble shooting and an estimate for repair WITH warranty.
Last edited by flybd5; Nov 27, 2017 at 04:11 AM.
MBWorld Fanatic!
Joined: Oct 2011
Posts: 7,107
Likes: 765
From: Bronx, N.Y.
2002 ML 320 & 2006 ML500
What was your procedure for disconnecting the battery, except the part with the seats and covering,<strong> just the battery.</strong><br /><br />All of these CAN codes are caused by low voltage or poor battery connection.<br /><br />Do you still have the problem of not being able to use the key to start the eng.?<br /><br />Even though it has nothing to do with your starting issue, when are you going to replace the Inlet Shutoff Sensor?
Last edited by Maj. Dundee; Nov 27, 2017 at 06:56 AM.
Thread Starter
Junior Member
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2011 ML350 Bluetec
I always had the key problem, i was told its a common issue think the guy said eis problem, it always worked with the push start so I never got around to fixing it, i am gonna take back I think it's a faulty alternator, i also want to get scanned with a star computer maybe a computer is burned
Super Member
Joined: Jun 2014
Posts: 507
Likes: 25
From: Massachusetts
2014 Smart ForTwo Passion Cabrio
Thread Starter
Junior Member
Joined: Aug 2015
Posts: 51
Likes: 0
2011 ML350 Bluetec
I reset all the modules with my scanner and it ran fine for a day then the same thing happened, keeps saying put it to park if i leave the ignition on for a while it glitches and everything goes away, either the module is damaged or i have a faulty alternator , waiting until saturday to get it plugged into a start computer.
