Unresponsive car

[tsedge]

Are you sure autohold triggers the brake lights?

For the entire duration you’re stopped?

Yes. It works by holding the brakes down after you press them. The brake lights will stay continuously illuminated the whole time you are stationary.

If so, that’s the only possible advantage to auto-hold that I could fathom (no dazzling brake lights) completely nullified.

The advantage to autohold is convenience. You simply brake to a stop and gently increase the brake pressure and the car is held until you press the accelerator. No switching on/off the parking brake and waiting for the electric actuators to release.

You can argue that's marginal but it is one less thing to do and you do get away a bit quicker.

 

[Rolfe]

Absolutely. I was always in the habit of keeping my foot on the brake unless the stop was going to be for a significant time. This just saves doing that. Give the brake pedal a wee extra push, see the auto-hold symbol go green, and you can take your foot off the pedal. If you want a quick getaway, you can then hover over the accelerator. A small thing, but it turns out it's very handy.

 

[ALANB]

Of course, when I'm on a hill waiting at traffic lights I use the park button. I don't do this on the flat , I use the autohold , but after one incident where the autohold released and the car started to roll into the back of the car in front, I sometimes use the park on an incline. Is this wrong and I should only press the p button when I'm getting out of the car. ?? On my test , I was taught to use the handbrake, so I guess I should just hold it on the brake all the time now, according to everyone on this forum .

Use auto hold, or keep your foot on the footbrake. If you use the footbrake method, the car has a hillstart feature so as long as you press the accelerator quickly it will not roll back.

 

[bowfer]

Yes. It works by holding the brakes down after you press them. The brake lights will stay continuously illuminated the whole time you are stationary.

The advantage to autohold is convenience. You simply brake to a stop and gently increase the brake pressure and the car is held until you press the accelerator. No switching on/off the parking brake and waiting for the electric actuators to release.

You can argue that's marginal but it is one less thing to do and you do get away a bit quicker.

I know how it works, I was only asking if the brake lights stayed on….
So the only ‘advantage’ is not having to keep one’s delicate little foot on the pedal when you’re stopped.
Whoop Dee doo, ignored.

 

[Torryhun]

Use auto hold, or keep your foot on the footbrake. If you use the footbrake method, the car has a hillstart feature so as long as you press the accelerator quickly it will not roll back.

Surely if the hillstart is working properly it won't roll back at all?‍

 

[bowfer]

Surely if the hillstart is working properly it won't roll back at all?‍

Hillstart on any car I’ve experienced only lasts a set amount of seconds.
Enough for a driver to press the accelerator (auto) or get the clutch biting (manual)

 

[PeteC]

I know how it works, I was only asking if the brake lights stayed on….
So the only ‘advantage’ is not having to keep one’s delicate little foot on the pedal when you’re stopped.
Whoop Dee doo, ignored.

My delicate little foot loves it! ?

 

[bowfer]

My delicate little foot loves it! ?

Not enough for me.
Not dazzling the person behind would have made me use it though.

 

[Rolfe]

I know how it works, I was only asking if the brake lights stayed on….
So the only ‘advantage’ is not having to keep one’s delicate little foot on the pedal when you’re stopped.
Whoop Dee doo, ignored.

That's what I thought when the dealer explained the facility to me. My delicate little size 4s turned out to be really keen on it.

I have from time to time, usually on long drives, suffered from really painful cramping of the shin muscles on my right leg. I have on occasion tried to drive with my left foot to ease this - even in a manual transmission car on the motorway. Any little way to spare these muscles is appreciated.

 

[Sloucher]

Of course, another advantage (when using "creep"), albeit minor, is that there is no power being applied to the motor when autohold is used, whereas if you hold it on the footbrake alone, then power is being wasted through the motor. A bit like holding an auto ICE car on the brake.

 

[tsedge]

I know how it works, I was only asking if the brake lights stayed on….

Obviously you didn't know how it works or you'd have realised the lights have to stay on.

 

[bowfer]

Obviously you didn't know how it works or you'd have realised the lights have to stay on.

Au contraire.
That’s not part of ‘how’ it works.

Of course, another advantage (when using "creep"), albeit minor, is that there is no power being applied to the motor when autohold is used, whereas if you hold it on the footbrake alone, then power is being wasted through the motor. A bit like holding an auto ICE car on the brake.

This makes no sense whatsoever.

 

[PeteC]

This makes no sense whatsoever.

The statement or the fact that the car does that?

In my car the power indicator shows a small amount of power being used when stopped with your foot on the brake, zero power being used when auto hold is in use. Mind you, it's so little it's not really of any significance.

 

[bowfer]

The statement or the fact that the car does that?

In my car the power indicator shows a small amount of power being used when stopped with your foot on the brake, zero power being used when auto hold is in use. Mind you, it's so little it's not really of any significance.

The statement, it was confusing.
But I see what you mean now, having your foot on the brake has the motor applying ‘some’ power in anticipation of you wanting creep.
Whereas auto hold doesn’t apply any as it knows you don’t want creep.
Then again, in terms of power consumption, having to apply more throttle to cancel auto hold isn’t great either.

 

[tsedge]

The power usage either way is negligible and no advantage.

Just keeping your foot on the brake is basically the same as auto-hold.

Some people like to rest their foot, so that's a benefit to them but not everyone likes it.

Others put the handbrake on or even put the car in P and then back to D, like an echo of a manual ICE car.

It takes all sorts.

 

[PeteC]

The power usage either way is negligible and no advantage.

Just keeping your foot on the brake is basically the same as auto-hold.

Some people like to rest their foot, so that's a benefit to them but not everyone likes it.

Others put the handbrake on or even put the car in P and then back to D, like an echo of a manual ICE car.

It takes all sorts.

Agreed!

 

[Ian Key]

It takes all sorts.

There's definitely all sorts on here ?‍?

 

[dsimpkins]

I've had a problem a few times trying to drive off after applying the hand brake (not P) at lights/junctions. However, when I press the accelerator peddle to pull away, I get a warning about seat belt not fastened. I found that only by undoing the seatbelt and reclipping it would allow me to pull away.

I've since found out about autohold, switched it on, and do not bother using the hand brake at junctions or traffic lights.

As others have said, have also noticed a small amount of motor power still being applied if using footbrak only to hold at lights, unless I press the peddle harder. About the same amount required to engage autohold.

 

[PeteC]

As others have said, have also noticed a small amount of motor power still being applied if using footbrak only to hold at lights, unless I press the peddle harder. About the same amount required to engage autohold.

Just so. To satisfy my curiosity, after my earlier post saying that there was a small amount of power indicated with my foot on the brake, I went out to play with autohold and found it was just as you say - if you press harder but still not hard enough to engage autohold, the power usage goes down to zero. I also found that you could release autohold without touching the accelerator by pressing the brake pedal again while autohold is engaged after which the car will creep. As I say, this was all just to satisfy my curiosity! ?

 

[kin]

I only had experience with Tesla one pedal driving.
I assumed that the MG4 with one pedal driving would have auto hold engaged automatically every time it stopped, right?