Regardless--auto stop/start systems have been common in vehicles for well over a decade now. If they truly were bad for starters, we'd see lots of threads about failed starters here in CL, and in all other owner forums. And yet, it's mostly crickets. I cannot opine on how much fuel these systems save, but I don't see anything to back up the fears that they will cause starters to prematurely fail.

 

It's not just that... I don't want my oil pressure constantly fluctuating like that and my engine constantly cycling on and off. I don't care how much they say it's fine. Not to mention just living with S/S is god awful. I still can't believe how crappy that E-Class Mercedes' SS system was. They didn't even try to do ANYTHING to make it refined or transparent. You can catch the Yukon being imperceptible sometimes (it still sucks) but an E-Class Mercedes they did nothing to try to refine it? It's literally like turning a key off and restarting it at every stop in that car, I was shocked.

 

That E Class Mercedes was older. Modern Mercedes with the 48v system its seamless. Mine shuts off before I come to a stop and comes back on as soon as my foot touches the gas, only way you know is looking at the RPM. Only time I turn it off is in stop and go traffic.

 

Old or not it was unacceptable. I guess I was ignorant because I assumed S/S was imperceptible in pretty much all cars at first (a substantial Benz???). I first started noticing it back when we were still in LA, hearing it at all the stoplights etc and it was 2014-2015 when all that roughly started. Glad the 48v helps.

 

It does, though I will remark that SW turns his off when it normally does the most.....

 

I think we have to start looking at these things through a slightly different lens. It's not about the individual fuel savings, which we would all agree aren't massive, it's about the savings in the aggregate across hundreds and thousands and millions of end users. Auto stop/start obviously has some positive impact on overall economy otherwise manufacturers wouldn't include it to help meet their fleet economy goals, and while individually the savings don't necessarily move the needle, those small savings will add up to a very significant number across the entire population of users. And count me in as someone who no longer has any issue with the system now that the cars we have that the feature are 48V. It's mostly pretty imperceptible on a modern car and in almost all circumstances it no longer frustrates.

 

I disagree. Start stop is a rather obvious choice (a choice--not a solution, bc 95% of it is so crappy in implementation) that automakers were forced into --even if it isn't mandated-- because of unreasonable fuel economy standards.

 

No. I've disabled them on all my and my families cars and the normies can suffer those systems if they can't figure out how to remove them

 

I don’t think I have the option to code it off on the X7 but it’s a mild hybrid so I guess it’s not too bad but it’s noticeable whenever it restarts. A previous X7 M60i owner got rid of his X7 because he hated the auto start stop. He now has the X7 40i and he stated it’s not as intrusive as it was on the 60i. It’s noticeable to me

I coded it off on the Supra.

 

No, its a feature that has improved a lot. Anyways in a Mercedes its very easy to code it off.

Its the constant stopping and starting of the stop and go traffic that makes it annoying, regular driving its really no issue.

Agreed.

Pretty sure in Sport mode it wont do it on the BMW...

 

It's 5-8% per tank S/S claims to save. Just drive lighter to do that.

 

Yet everyone hates S/S still so much that even the EPA is saying "we're done." Even I of all people didn't see that one coming, knowing full well how much people don't like it.

 

It's up to that much, if your drive doesn't involve stopping like mine it's useless

 

I don't give a rat's *** about 5% anyway, I'd like to enjoy the nice car I drive and not be annoyed by it.

 

My 2025 Cayenne and Tucson stop/start implementation is horrible and when it’s hot the a/c doesn’t blow cold air when the engine shuts off. My BMW even without the mild hybrid in two different cars weren’t noticeable so I never turned it off. I turn it off every single time I drive the Cayenne or Tucson, every time...

My 2021 M50i’s stop/start was excellent without a mild hybrid. I’m surprised it’s that bad on the M60i.

That’s how it worked on my X7 and also my Cayenne. I will typically turn sport on right away in my Cayenne for that reason alone.