So back in December I had a CEL pop up on startup. I hooked up my code reader and it showed code P1B95. I cleared it with the reader and it never came back. Fast forward to a couple days ago and it came on again at startup. Checked the code, same code. Cleared it. Couple days later it came on again at startup, so I scheduled a service visit. It cleared on its own the next day and is still off but its at the dealer anyways.

Anybody had this issue and this code before? Googling seems to give some conflicting info. Some data shows its a hybrid battery overvoltage, and some shows its a fuel system issue. Car drives totally normally...

 

Please keep us posted, never heard of this issue and this is the only thread I found, also a W223 but evap system related https://mbworld.org/forums/s-class-w...c-circuit.html

 

It can be many different things, but maybe check the EVAP pressure sensor?
Generally, DTCs with whatever 'sensor/circuit low' is related to a bad sensor or module.

 

Its at the dealer and they're working on it. I'll update everybidy

 

Purging pressure sensors, they are replacing both.

 

As expected.
Some of these sensors, they just go out without any rhyme or reason.
Glad it was fixed rather quickly.
If possible, could you share the labor time (LTS) listed in the service document after the fix?
I'm interested in how involved it is to get access to these sensors.

Thanks!

 

I will when I get it back, they told me it should be done today

 

Likely defective from factory and just failed altogether when it got worse. Happens, glad they fixed it and happy to hear it is an isolated case for this vehicle.

 

Actually the dealer said this is pretty common.

Unfortunately my invoice doesn't show the number of labor hours.

 

Pretty common? Hmmm, strange as I don't hear it reported on the forums or I missed it or maybe because most of S-Class owners don't visit this forum.

 

Yeah outside of that one other post I haven't seen anything about that either

 

Even forum member streamliner's very flawed 2022 W223 didn't have this issue.

 

Forums may be places where problems and issues are blown out of proportion making other members aware of said troubles,
but service centers are where ONLY cars with issues come for service.
If a tech/mechanic maybe saw half a dozen of the failed sensors, he'd think it's 'common'.
I don't think this is a critical or common issue to be sweating over.

 

True

 

This car is buggy. I will get emergency brake assist unoperable messages every now and then that disappear after a restart.

 

I guess you haven't been back to the dealership for some updates to see if it can solve it?

 

In case there are stored codes in the system. Get your service advisor to diagnose it remotely https://developer.mercedes-benz.com/...nostic_support

 

Definitely bugs here and there.

 

Give it some time, maybe all will be good once the facelift comes out.

I mean, most are minor ones now so that's the good part.

 

You would think with that tool available more dealerships would attempt a remote diagnosis rather than have you schedule an appointment for diagnosis 3 weeks out and then a subsequent appointment another month out for the actual repair. I can envision all sorts of cost savings. IMHO much more efficient.

 

I have not experienced anything that I felt was a big deal at all. The technology is just buggy in spots.

 

I was amazed, they took mine the next day and had it back to me the same day

 

Yes that is the good part.

 

My home dealer also sells VW’s and Kia’s both of which are a dime a dozen locally. I’m sure that explains the service delays. The nearest M-B only dealer is an hour and a half away. Their service dept is only marginally better. Still, I may end up using them.

 

Wait so they technically isn't an official MB dealership?