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2011 ML350 Bluetec dashboard error codes and drive to workshop warning
2011 ML350 Bluetec went nuts today. The dashboard lit up with tons of errors(pictures attached), not able to select gears. Hardly made it home and after the engine was turned off, it does not start now.
Scanned error codes with my OBD tool and got the following:
P0070
U0129
U0101
U0155
U0447
P0500
U0073
After the scan the communication with my reader broke so I could not even erase the codes.
Battery was replaced on the vehicle a year ago. Never had issues like that before. Please help.
Alex, you are having a problem with the seat belt system and when that occurs the brake system is stopped .
The codes you posted are definitely from a CODE READER and not a SCANNER which you should have.
DO NOT drive the car any further until you get a scanner.
Thanks for the reply. I also forgot to mention that horn does not work, wipers go off on their own randomly, I can not select the gear anymore, and now it does not even start. That seems a lot for a seat belt only issue. It also beeps a lot inside and tachometer jumps a lit even though rpms are steady. I would bet it is more electrical than anything else, but you probably know more than me so I appreciate the input. Thanks
Alex, go below the steering wheel and grab the plastic covering of the steering column with both hands (one on each side) and slightly try to turn it back and forth.
I did check the steering column as per your post no movement. I also checked the battery voltage: 11.75 when car is off and 14 when running. The car did start today but still has all the issues, even more. It also says esp inoperative, run flat inoperative, turn signals do not work, wipers do not turn on from steering wheel, they have mind on their own, horn does not work, and that is all with the previously mentioned issues.
After the car ran for 5 min today ( still not able to select any gears and tachometer not showing any rpms) I shut the engine down and it would not start again.
Last edited by AlexCanada; Feb 6, 2022 at 11:09 AM.
One more thing. My reader/scanner has two functions, one generic obd2 codes which I listed above and it also has vehicle specific scans. When I try to read w164 specific codes for TCM, ECM, SRS and ESP the reader says NO SYSTEM CONFIGURATION INFORMATION.
So you think taking apart steering column is the next step? I did take steering wheel off last night with the airbag and all looked fine. Perhaps I need a garage scanner next. It is weird they way all went to ****. It looks like modules are not communicating with each other. I will keep at it
Just wanted to update some information. I have checked under both front seats the electronics for water damage and they look brand new. Also checked the ECU unit under passenger fender, looked great.
Was able to read some new codes through Mercedes side of the code reader and got the following: 9186, 9195, 9193, 9181, 9186, 9187, 9188, 9189, 918A, 918B, 9183, 9184, 9185, 918C
Was able to clear them once but they came back as soon as I put the key in. I was able to read the codes through OBD connector but without the key in the ignition, which was weird.
These codes might be all from the SRS system as both front seats were disconnected at the time of the read.
Last edited by AlexCanada; Feb 9, 2022 at 02:51 PM.
Just wanted to update some information. I have checked under both front seats the electronics for water damage and they look brand new. Also checked the ECU unit under passenger fender, looked great.
Was able to read some new codes through Mercedes side of the code reader and got the following: 9186, 9195, 9193, 9181, 9186, 9187, 9188, 9189, 918A, 918B, 9183, 9184, 9185, 918C
Was able to clear them once but they came back as soon as I put the key in. I was able to read the codes through OBD connector but without the key in the ignition, which was weird.
These codes might be all from the SRS system as both front seats were disconnected at the time of the read.
Alex did you got any solution for these errors, I am having same errors and it appears intermittently and it doesn't start after switching off. No errors in scanner and Mechanics says probably its EIS fault. Can you please confirm?
2011 ML350 Bluetec went nuts today. The dashboard lit up with tons of errors(pictures attached), not able to select gears. Hardly made it home and after the engine was turned off, it does not start now.
Scanned error codes with my OBD tool and got the following:
P0070
U0129
U0101
U0155
U0447
P0500
U0073
After the scan the communication with my reader broke so I could not even erase the codes.
Battery was replaced on the vehicle a year ago. Never had issues like that before. Please help.
2011
check for water corrosion:
1/Remove and take out SAM under passenger seat next to the battery
2/ CGW central gateway unit under the driver seat.
if 1 and 2 are good, most likely EIS problem.
Try this to see if working/starting
Put the key in EIS ( remove push button if you have keyless go)
turn to ON position, don’t start the engine yet, wait for 10-30 second for EIS module to read/communicate with your key.
then start the car.
One more thing. My reader/scanner has two functions, one generic obd2 codes which I listed above and it also has vehicle specific scans. When I try to read w164 specific codes for TCM, ECM, SRS and ESP the reader says NO SYSTEM CONFIGURATION INFORMATION.
When you post codes do not select the generic codes which are P codes.
I got mixed up between you and the original poster.Please update your profile to include the year, model (is it GAS, CDI or Blue) and where you live.
Its a GAS ML 350 2009 model w164.186.
I got this error again during driving today, I was driving to lower the speed and it suddenly came up and gear was kind of jerk like it was forcefully changing gear. After two or three gear, gear started showing 'D' otherwise sign of gear position was gone.
I drove to workshop to check error codes there were loads of errors related to ECM,TCM, EIS etc.
They cleared up but it appeared again unless we disconnected battery wire to reset.
I went to key guy who i knew for GL 500 fixed up. He checked EIS in his system he said there is something wrong with the software some C09 is not sending signals to ECM. He further said he can try replacement of EIS with transfered same data to new EIS and check if it would work.
I have exactly same errors and symptoms like Alex got. No Indicator, Horn, etc works when this error appears.
I hope you guys will come up with some solution because the key guy is just trying to see EIS program.
Here's the code i saw on ECM
Last edited by SunnyDub; Feb 10, 2022 at 02:16 PM.
SRS, ESP, Airmatic…etc …Warnings on dashboard Error code read from Icarsoft reader. Used toothpick cleaned pins Pin 1&6 , Red and Orange cables got water corrosion
Working good after cleaning CGW’s connector and pins.
Thank you for your reply Emily. I appreciate it. I did check the unit and connector under driver's seat, passenger's seat and under the passenger fender and all look good, no signs of water damage. I also wanted to say say that three days before this happened I connected a new rear fender radar for blind spot assist as mine got destroyed, but it did not take it as the "Blind spot Inoperative" did not go away. I did disconnect it as soon as this happened but it did not help.
One more thing. My reader/scanner has two functions, one generic obd2 codes which I listed above and it also has vehicle specific scans. When I try to read w164 specific codes for TCM, ECM, SRS and ESP the reader says NO SYSTEM CONFIGURATION INFORMATION.
We do not need generic codes, we need the other , In post #2 I said they were unreadable and you did nothing about it.
Thanks Maj. Dundee, I understand that generic codes are useless to you, but that was the only thing I could get. It would not read anything vehicle specific like Mercedes codes(says no communication with ECU). I will try to see if I can get a mechanic to come down to my house and try to read them for me but until then I am stuck.
I also tried to check voltage going to Central gateway control unit N93 and I do get 11.75v to it with ignition on.
Well, new developments on the issue. After unsuccessful testing of Mercedes specific codes I have removed the battery from under the seat and started charging it at 2A(slow charge). It took 2 days to get it fully charged. After putting the battery back I was able to connect with my scanner to the diagnostic port and read Mercedes specific codes. Took photos of all of them (there were about 10-14 per module like engine, transmission, ESP). After I tried clearing them all and they successfully cleared. Started the car and they did not come back. The only codes I have now are SRS and that is because I have two front seats out of the car. Based on that I can assume that the battery is no good or the alternator. The battery is one year old Energizer from Costco. I have tested it with the load tester and it was borderline before being charged. The only permanent code that I have left is U0002(High speed CAN Communication Bus performance), I know its not Mercedes specific code but I figured I will mention it. I will try to put the car together tomorrow and do a test drive. I am also planning to take it to the garage for them to read codes as well and do a test on the battery and alternator. I can not believe that if it is the battery or low juice from alternator the Mercedes could not have one simple warning on the dash, but instead the whole dashboard lights up like an ornament on the tree.
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