I'm using a GooLoo S4 Smart Charger.

 

I see, hmmm so it doesn't use lights, so on the screen what is the battery level shown at what voltage?

 

The manual says the voltage display is the current voltage of the battery but I've found that to be incorrect or at least partially correct. When it's plugged into AC power, it's the voltage being applied to the battery at that time. Basically the charge voltage. Disconnecting it from the AC power while still leaving it connected to the battery shows the actual battery voltage. When I started the update process I think I incorrectly assumed the battery level to be at what the charge level was. It showed 12.2v when the battery was really at around 12.0 and charging at 12.2v. Apparently this charger ramps up its charge voltage as the battery increases. It dropped down to 12.1 on the charger while I had the car in ACC mode and the battery dropped to 11.9 according to the maintenance mode display. It got as low as 11.8 before it complained the battery was too low. The whole process, it only dropped about 0.2v to 0.3v and I even played some music at a pretty high volume initially to test out a new Dolby Atmos album I added to my USB music collection.

What I should have done was get the battery fully charged with the charger before doing the update. This combined with keeping the charger on while doing the update should have kept the battery well above 12.5v the entire time of the update. I'm going to try that next time and see how it goes. This was an experiment on doing the long update without having to drive the car. I would rather not let it idle for as long as these updates take and don't want to take an unnecessary trip every time I need to update. The last update (3.2.1) was done while on a road trip where I started the process 2 hours before my final destination where I knew I would be driving non-stop the rest of the way. It took all of 90 minutes to finish and I wound up stopping shortly after for a bathroom break which allowed the update to take effect after restarting the car.

 

Thank you for sharing your observations, Good on you for doing the experiments.

Sounds like a plan, I don't see why charging it beforehand wouldn't improve the situation. Thing is with a 48V mild hybrid system, that battery also needs to be charged while driving so it takes even longer for the 12V battery to be charged with normal driving.

May I curiously ask why didn't you buy a CTEK? They made the OEM MB chargers as well as the charger for a lot of other brands including Rolls-Royce: https://mbworld.org/forums/coupe-roa...ml#post8548131

 

I had the GooLoo already and it works fine on the battery in the E. Its an AGM battery and the charger I have supports AGM. No need to buy another. I also have several Battery Tender brand maintainers that I use for my mowers, ATV, and motorcycles.

 

Washington State, E53.

 

I see, that answers my curiosity.

 

I see, thank you for letting me know that.

 

My upgrade was not so succesful, all got display’s got black could not drive. Had to call MB assistance and wait for tow truck🙄

 

Uh oh, how come, sorry to hear that.

 

Can you expand a little more on what happened? What year and model you have and what version of MBUX did you have prior to the update? Did you perform the update without interruption or did you turn off the car several times? When did you get the blank screen, was it after the update completed successfully or did it happen before it finished?

 

Yes, it would be nice to know if it downloaded totally whilst driving or if it was left to download with the key on and not running, possibly running the battery down. I hooked up a midtronics charger like the dealer uses to mine and it was definitely drawing the juice.

 

MY2024, 300DE. I did not so anything, it was an over the air update that contained MBUX 3.2.2. that probably went wrong. I could drive the car but all black, no speedometer, no signals, nothing. Tow truck came we took off the minus cable from the battery. Waited some 30 s and the all got powered up again. Engine lamp came on. Continued to drive. Stopped and turned off the car after some driving. Restarted and the engine lamp dissappeared. Since then all OK. I already had a major issue with the car last winter. Turbo breakdown. So then towed to a service station and complete exchange of the whole Turbo unit. I love the car but the reliabilty is a problem and I cannot trust it….

 

Please let us know what happened.

 

We’re in Georgia. Update on E350 installing now, May 31. Have not received an update forGLC43.

 

Looks like they are slowly but surely coming.

 

My guess is the location of the vehicle has nothing to do with the timing of an OTA. Perhaps country wise, yes, but not likely within a single country or market even. It's more likely randomly done with some consideration given to model and year. Meaning a random set of 2024 W214's, another random set of 2025 W214's, and repeated over the S214, X214, and other models entirely as long as they have the same family of underlying tech. Then they wait which is called "bake time" in the software deployment world to see if there are reported issues. If no issues after a predetermined length of bake time they slowly roll it out further until all vehicles have it. If correct, all this means is you get it when you get it. I would prefer not to be the first as I have no interest in being a beta tester for my daily driver. This is why I disable automatic updates and require a PIN to update. I'm glad there are people willing (often unknowingly) to be the beta testers. I'm sure MB tests internally before any deployment of an update, but the sheer variety of vehicles is hard to simulate in a test environment.

 

Yes, I observed that as well so that made me asking about which states got it previously, pointless. There is really no pattern it seems, just pick a ball from a box type of thing.

 

Speaking of beta though, only chatgpt got a beta, not mbux version right? I seems that mbux doesn't get a beta in the form of how ios gets a public beta?

 

They do have betas for options like ChatGPT. Another was feedback which allowed in-car feedback of various features. I've opted into the betas for options, but that's not the same as being the first to install a new MBUX version which technically is not a beta.

 

Maybe they allot the downloads by VIN #. They could dump the lowest 10,000 serial #s, then the next 10k, etc.

 

With the amount of bugs with mbux really hope they do public beta testing.

 

That doesn't seem to be the case either (at least of what I observed), it is really random.

 

NL car here, no update received so far. Production date is 12.2023. My guess is it’s all random

 

Yes seems to be the case.