Anyone have Xentry or similar to scan my car near north wales Pennsylvania




> How long did it take for your battery to run low?
I would physically look at both front door control Modules... they get soft-crashed and prevent quick CAN-B COMs when F-SAM does its regular network polling. This is what drains MB battery in days instead of weeks.
The real problems are under the radar, not listed on the faults report.

Last edited by CaliBenzDriver; Jan 17, 2024 at 03:33 PM.
Now, on to making changes. After selecting the ECU (ME), go to Variant Coding. Then select Implicit_variant Coding. Scroll down to No. 019, Vehicle Speed Limit. Select your speed and then Write Coding. The engine needs to be ON but NOT running. Follow the prompts. The new speed limit has been written into the ECU.




Some modules are like candy stores. So far I have enjoyed these:
- AAC HVAC
- ECU
- F-SAM/CGW
- iCLUSTER
Most others modules have fewer useful options for us to toggle, dumbo peripherals.
Features based on hardware require the connected parts and the matching software. Not just a magic On/Off toggle brings joy every time.
cReader + Benz : more power to us!
Save original setting options before you modify them. "RTFM" + try to keep a record of what you massage.
Treat unfamiliar firmware with an once of respect... careful, this stuff runs your precious car.
🤞
FYI caution: explore at your own risk - I picked up some odd actuator fault after massaging my HVAC settings. (My stock actuators have been soldered reliably for couple years). I think exposed options may bring mixed outcomes. Untested software combinations are extra fragile.
Let's see!

Last edited by CaliBenzDriver; Jan 17, 2024 at 04:13 PM.
From the Engine Control Module (ME), go to Variant Coding (or maybe Setting/Changeover) and find Engine Start/Stop. Then select NOT ACTIVE. It should take you to the previous screen (or maybe you need to navigate back). Remember you need to Write Coding for the change to take affect. Follow the prompts.
Remember, I have not actually done this, but I did change the speed limiter as described above. As always, proceed at your own risk.




There's probably two dozen useful options that would be best found under an archive cReader thread and/or indexed by chassis/engine variants.
LAUNCH Elite
The Best of Mercedes & AMG
Last edited by JettaRed; Jan 19, 2024 at 07:26 AM.








That 9027 code was only visible in the dev section of DAS in the UCP module (and does not appear in this quick scan report), but I simply cleared it.
Looking more closely, some (all?) of the codes remaining were there in early Jan when I first scanned with DAS. So it is possible that the Launch tool didn't clear them properly. I should attempt to clear them with DAS and see if they go away. They are all stored except for the mirror heater (which is actually failed) and the COMAND software (because I updated the firmware to fix the GPS time issue). So, they should clear and go away if I am correct. Not sure why the Launch tool couldn't clear them (or the 9027).
Last edited by kevm14; Feb 4, 2024 at 07:06 AM.




> How long did it take for your battery to run low?
I would physically look at both front door control Modules... they get soft-crashed and prevent quick CAN-B COMs when F-SAM does its regular network polling. This is what drains MB battery in days instead of weeks.
The real problems are under the radar, not listed on the faults report.

This car has a big aux battery so it's not obvious what its state of charge is. The car always cranks the same because the starter battery is dedicated. That said, I have been suspicious that there is extra drain on that aux battery.




This car has a big aux battery so it's not obvious what its state of charge is. The car always cranks the same because the starter battery is dedicated. That said, I have been suspicious that there is extra drain on that aux battery.

Let's navigate the line of "scanner application".
You submitted your car SCAN REPORT, I took the time and interest to process it.
My post was the resulting steps to deal with the issues.
A scanner output is an necessary input of evidence. How you understand that is "art & science", like cooking real food.
Each fault helps understand which module bugged out on what sort of issue.
The good problem to fix are the known ones that are not fully developed such as:
"Oil in harness"
"Oil pump solenoid"
Diff. Oil
Tranny Mount
Chassis Main Strap
Stiff Serpentine Tensioner
Limp Chain Tensioners
...
...You can find the specific action items in my original post.
> Take-home here :
FLOAT or disconnect your batteries. Flat batts are as good as junk that will keep challenging the MB electricals with low-voltage issues. Countless odd faults straining weak connections with higher current spikes.
No great antidote for dead battery, only preventive action. Batteries are like tires : don't use them flat. ✌️
Last edited by CaliBenzDriver; Feb 14, 2024 at 05:43 PM.




I should note all of this work is in DAS on my 07 S550, so I apologize for all of this being in the AMG W212 forum. Probably confusing for some.



