Do brake lights illuminate during auto-regen?

[4thPcar]

Oh and just in case anyone hasn’t discovered auto regen, press and hold the regen button for 1-2 seconds to enable it. Note the regen icon on the dash, it will flip to having a letter ‘A’ beside it. Hold the button too long (or too short!) and it will toggle back off again.
Or change in your drive mode settings. I’ve enable it in my Individual setting mode by default.

I would love to have it enabled permanently but I don't think I can do that in my vehicle...

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[d00d]

I select regen on back roads to mimic off throttle ICE behavior, so I don't show brake lights to Polizei, compared to no regen and light brake application.
When approaching a slower moving car, I hold the button for auto regen for similar effect.
Thought an option of both regen and auto regen would be useful.

 

[Jhenson29]

When I had my 911S I'd often downshift when approaching traffic to slow the car. I was told this may not be good for the engine but it became a reflexive motion for me after a decade of driving the same car. The auto-regen has a similar feeling when it kicks in. I'm addicted to it.

I downshift to slow in my 911 also, but it’s operation is consistent based on my actions, not my environment. That’s the difference.

Edit; I also don’t think it’s bad for the engine. AFAIK, it’s fine. I keep auto rev match on, so clutch should be okay too.

 

[Scandinavian]

When I had my 911S I'd often downshift when approaching traffic to slow the car. I was told this may not be good for the engine but it became a reflexive motion for me after a decade of driving the same car. The auto-regen has a similar feeling when it kicks in. I'm addicted to it.

Down shifting on a manual car is the way to do it, and I believe it is good for the engine as well.

I remember a research paper many many years ago from Aachen about the effects on engines when towing a caravan. And I think they did it with a VW then. The result indicated that when the engine pulled the caravan it had a load on one side of the main shaft and bearing, but when the caravan pushed the VW downhill for example, the opposite side got the load. That way new fresh oil was flowing in to the bearings and ready to take the load. The wear on such engine did not show any adverse effect at all, quite the opposite if I remember correctly.

 

[4thPcar]

Down shifting on a manual car is the way to do it, and I believe it is good for the engine as well.

I remember a research paper many many years ago from Aachen about the effects on engines when towing a caravan. And I think they did it with a VW then. The result indicated that when the engine pulled the caravan it had a load on one side of the main shaft and bearing, but when the caravan pushed the VW downhill for example, the opposite side got the load. That way new fresh oil was flowing in to the bearings and ready to take the load. The wear on such engine did not show any adverse effect at all, quite the opposite if I remember correctly.

I'll take your word for it, but someone could start a whole new thread on that debate (but it won't be me!).

However I was driving an auto enthusiast in my 911 some time ago and when downshifting at a fairly high speed and he said "that's really not good for the engine." I said I did it to preserve the brakes so they didn't need to be replaced as often. He said "what would you rather have to do, replace the brakes, or the engine?"

That got me thinking, then I bought an EV and it became irrelevant.

 

[bn8959]

So it has to detect an upcoming vehicle to allow a deeper degree of recup/regen which presumably then reaches a deceleration level that triggers the brake lights?

…and you’re 100% confident that in this process there is absolutely no mechanical brake blending / assistance whatsoever?

that’s my experience.
Its never braked significantly under auto-recoup (but way more than normal recoup). I’ve watched the green recuperation bar and I’ve seen it swing to roughly 3/4 of max, but it’s never got to full, so I’m pretty certain it’s never got close to using mechanical brakes.

 

[WasserGKuehlt]

I'll take your word for it, but someone could start a whole new thread on that debate (but it won't be me!).

However I was driving an auto enthusiast in my 911 some time ago and when downshifting at a fairly high speed and he said "that's really not good for the engine." I said I did it to preserve the brakes so they didn't need to be replaced as often. He said "what would you rather have to do, replace the brakes, or the engine?"

That got me thinking, then I bought an EV and it became irrelevant.

The break-in instructions for my newly rebuilt engine recommended engine braking, as it’s essentially achieving higher revs with a lower actual load.
(The instructions did not specify the behavior of brake lights.)

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