asdf

Just drove 40 miles to drop off the car for PPF.
An hour later, received the message from MB that "the starter battery charge status is critical" and that I would need to drive the car for 30-60 minutes or connect to a battery charger.
This is really weird. The SOC was 78%, and I had just been on the freeway for 30 minutes.
Hopefully, when I pick the car up in 4 days, it will be to start.
Incidentally, the shop said they couldn't tint the front windshield because of all the sensors. They're concerned about water damage to these things.

njtransit215

An extremely common issue a lot of us here have experienced that MB recently put out a TSB for. Have the PPF people keep the car turned on while working on it and schedule a service visit at a dealership near you for a powertrain software update once they're done. The dealer should only need to keep the car for the day.

asdf

Thanks for your help.
I won't have the car back until Thursday. May have to jump start it then. Any precautions for the jump start process?
What's really irritating to me me is that having read about the PTCU update on this forum, I had specifically asked the sales guy before delivery to check on the PTCU update, and he said no need for anything.

c4004matic

Jump starting is just like any other car. I recommend one of the new, small litium jumper batteries. Cranking power is not an issue, all you need a 12 volt source. As soon as the car thinks its battery is fine it will start. Take it home, plug it in and everything should be fine the next day.

asdf

Thanks.
Fortunately, I do have a lithium jumper at home.
Regarding the update, sounds like it's a long thing. I hear updates in Lucid can also take hours, too. Wondering why. I mean even installing a new Windows OS isn't that long.

c4004matic

I belive its bcause its an entir operating system rather than a patch or little update.

hlothery

FYI. My tint shop had no trouble tinting the windshield. To my knowledge, there are no sensors involved in doing that. There is a camera looking through the windshield just below where the mirror is mounted, but with 70% tint, I have had no issues. All my systems are functioning normally. But, if you are worried about it, they can work around that part of the windshield.

asdf

That'd make sense.
Now I have to figure out how to prop the hood up for the jump start process. Hopefully, I can ask someone at the tint shop to hold it up for me.
Probably should look into buying an after-market removable hood prop.

hlothery

I had the PTCU update done, took just a little over an hour.

asdf

Thanks for the info.
Interesting thing is this is the shop that I've known for years and they're good at what they do. Was really surprised when they said no to the job.
I guess I'll just bring it to another shop for the windshield.
Can someone confirm that the front windshield already has UV blocking and IR shielding? Thanks.

StormingHabs

My very experienced tint shop had the same issue with the front windshield (and I also had to jump my car because the 12V drained while doing tint and PPF). Going to have the windshield done at another shop.

c4004matic

The trick to not drain the 12v battery is to keep the ignition on, the problem is that about 15 min the car turns itself off again. When doing a big project the solution is to connect a battery tender.

StormingHabs

That’s one way to do it. I had my tint/PPF put the car in Neutral and the park brake on and it ran for hours. Just like you had to do in a Tesla before they added a dedicated camp mode.

c4004matic

The heat rejecting windshield is part of the option package with the double paned acoustic glass. There is no need to tint. A shop that refuses to it its because they know what they are doing. Finally, installing a tint in such a tight space is a major PTA. Probably not worth the aggravation.

asdf

Well, I believe this feature is optional on the 450, and those of us picking a car from the inventory may or may not be so lucky.

c4004matic

Its optional on both models.

hlothery

Agree. I didn't have it on mine, and tint is a must in South Texas, so the tint was done. The results are awesome. Do not be afraid to get the windshield tinted. It is well worth the effort if you are in a hot climate. Every piece of exterior glass on my car is tinted. 70% on windshield and panoramic roof, 30% on front windows, 20% on rear.

asdf

My old tint shop was worried about his soapy solution on the front windshield making its way into the sensor in the rectangle in the middle of the dash, as well as the firewall's space .
I'll bring the car to another shop next week and see what I say.
By the way, this new shop recommends Spectra PhotoSync. I've always used 3M Crystalline. Anyone in hot climate like Tx or Az using Spectra?
Thanks.

hlothery

Nope. Went with 3M.

stealth.pilot

Where do you connect the battery tender? I couldn't find a 12v outlet in my car.

Same has happened to me. How did you jump the car? Should I call MB Roadside or do it myself?

Also where is the 12V battery - the owners manual doesn't say?

Is the 12v lithium jumper allowed on the EQS? When the car is plugged in, does it also charge the 12v battery?

c4004matic

The 12v battery is tended by the main battery whether its plugged or not. However if you deplete the 12V, as in any other car, its not going to instantly recharge it. You have to jump the 12V to start the vehicle and after wait for the main battery to recharge it. Thts why you can store the car for extended periods, The 12V "tender" is the main battery. At least thats my understanding.

stealth.pilot

Got it. My question was whether the 12v battery is tended only when driving, or also when the car is plugged in. The owners manual seems to suggest the latter.

c4004matic

I would think it does it all the time like a trickle charger, if not the 12v would drain while driving. Aside from the divetrain everything runs on 12V. Again, conjecture on my part. It would be nice if MB engineers followed these boards and answered questions.

stealth.pilot

That would be nice. I don’t understand why they don’t. I would want to represent my life’s work.