Start/Stop Question (S-Tronic)

Pook

Registered User
Just picked up my new A3 yesterday (as a replacement for a previous one after a successful car rejection), and I have noticed a difference in the start stop technology with my new one:

The engine is now cutting out at about 1-2mph as I am very slowly coming to a standstill as opposed to my previous car when I had to be fully stationary. Has anyone experienced this and is it normal?

Furthermore, in my old car I could always keep the engine running by very lightly holding the brake pedal, it wasn't until I fully depressed the brake the engine cut. Seems strange it is now cutting when still on the move, albeit very slowly.
 

Mattb555

Registered User
I have noticed mine will stop whilst in the last few feet of movement forward when coming to a halt sometimes, rather than when fully stopped. The pressure on the brake pedal does effect it coming on, but I have to say you have to be fairly light to stop it activating.
Makes me smile every time it cuts in on the RS, think it's fitted to just enjoy hearing it startup rather than save fuel!
 

slicko4211

Registered User
It's normal. Mine does this too

Sent from my SM-G900F using Tapatalk
 

WarwickL

Registered User
My S3 doesn't. Only comes on (when I forget to disable it) when fully stopped with brake hard on.

Edit - no, it doesn't give me a hardon but you get what I meant.
 
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RichardT

Registered User
I have to be fully stationary on mine for it to cut out.
 

WarwickL

Registered User
Sounds like you guys have faulty units - ******
 

thebluefox

Registered User
Mine does the same, cuts out before the car stops moving.

It is one of the more aggressive start/stop systems I've encountered!
 

WarwickL

Registered User
Sad to see so many faulty Stop/Start cars out there
 

Pook

Registered User
Thanks everyone for the replies, nice to hear everyone's experiences. I'm expecting my 2 day courtesy call today so will ask about it. WarwickL, what makes you certain this is abnormal?

Thanks.
 

WarwickL

Registered User
Working as described - as some of us have posted. Otherwise, faulty.
 

WarwickL

Registered User

Pook

Registered User

WarwickL

Registered User
A difficult fix you think?

It's Friday, I'm into my second single malt.

Either disable Stop/Start via VCDS or get used to the disable button.

The dealers won't be interested.
 

Pook

Registered User
It's Friday, I'm into my second single malt.

Either disable Stop/Start via VCDS or get used to the disable button.

The dealers won't be interested.
At 10:30!? Tough week??
 

Pook

Registered User
Some interesting reading in my A3 owners manual - and very contradictory!

Page 91
"Brake the vehicle to a stop. The engine will be switched off SHORTLY BEFORE the vehicle comes to a standstill OR when the vehicle is stationary* "

* = may vary in different countries.

So I'm guessing the system is set up different depending on region which I find odd.

But then to continue the contradiction:

Page 92
"You can control whether or not the engine is switched off by varying the pressure on the brake pedal. For instance, if you brake gently in stop-and-go traffic or before turning off at a junction, the engine will remain on while the vehicle is at a standstill. As soon as you press the brake pedal harder, the engine will be switched off"

Why is nothing ever just black and white lol!

I don't see how you can use this varying pressure feature well if the engine cuts before it is stationary. I much preferred my previous when the engine behaved what I would deem as normal.
 

Pook

Registered User

WarwickL

Registered User

WarwickL

Registered User
Some interesting reading in my A3 owners manual - and very contradictory!

Page 91
"Brake the vehicle to a stop. The engine will be switched off SHORTLY BEFORE the vehicle comes to a standstill OR when the vehicle is stationary* "

* = may vary in different countries.

So I'm guessing the system is set up different depending on region which I find odd.

But then to continue the contradiction:

Page 92
"You can control whether or not the engine is switched off by varying the pressure on the brake pedal. For instance, if you brake gently in stop-and-go traffic or before turning off at a junction, the engine will remain on while the vehicle is at a standstill. As soon as you press the brake pedal harder, the engine will be switched off"

Why is nothing ever just black and white lol!

I don't see how you can use this varying pressure feature well if the engine cuts before it is stationary. I much preferred my previous when the engine behaved what I would deem as normal.

Regress and buy your "previous" :)
 

WarwickL

Registered User
Must be an intermittent fault on mine it only does it now and then...Not really bothered by it to be honest...:friends:

I'd hate that.
 

WarwickL

Registered User
Hey, I'm the right way up, it's all you pommie ba5tards that stand on your heads, John Cleese style :)
 

WarwickL

Registered User
23be35f16d32ffe228f5e9b156a8bac8.jpg
 

RichardT

Registered User
I've never experienced it cutting out before you stop. And it is true that you can prevent it cutting out by braking carefully - but you need a real soft touch and concentrate hard!
I also have hold assist option. If that is active, then I find that braking to a halt activates the brakes as soon as you stop but you need to keep your foot on the brake for longer (maybe a second) for stop/start to kick in. In this mode it's much easier to control start/stop.
 

thebluefox

Registered User
Some interesting reading in my A3 owners manual - and very contradictory!

Page 91
"Brake the vehicle to a stop. The engine will be switched off SHORTLY BEFORE the vehicle comes to a standstill OR when the vehicle is stationary* "

* = may vary in different countries.

So I'm guessing the system is set up different depending on region which I find odd.

But then to continue the contradiction:

Page 92
"You can control whether or not the engine is switched off by varying the pressure on the brake pedal. For instance, if you brake gently in stop-and-go traffic or before turning off at a junction, the engine will remain on while the vehicle is at a standstill. As soon as you press the brake pedal harder, the engine will be switched off"

Why is nothing ever just black and white lol!

I don't see how you can use this varying pressure feature well if the engine cuts before it is stationary. I much preferred my previous when the engine behaved what I would deem as normal.

This is exactly as I experience it - so it might not be logical, but it's not a fault either then.
 

Pook

Registered User
I have noticed a further trend - when I slow down and I am coming to a stop the gearbox/engine does one of two things with 50/50 frequency-

1. When the engine gets to idle and is slowing down at about 3-4mph, the gearbox stays in second gear even at this snails pace, and this is the scenario when the engine cuts at 1-2mph. (1st gear is never selected by the gearbox, it goes from 2nd to then cutting out)

2. When the engine gets to idle and I'm down at 3-4mph the gearbox then selects 1st gear, and it is from this scenario I can then become stationary before the engine cuts, and I can successfully use brake pressure to keep the engine running or not.

This seems very odd to me. Booked in with the technician on Friday for a road test. I'm praying it's not another major problem after already rejecting the same car type due to a gearbox and brake issue and have only just received this as replacement. It isn't getting a third chance if this is serious.
 

Scottyg

Registered User
I very rarely see D1 on a normal days driving. Only once at start in the morning and same when driving home. Even at full stop it takes off in D2.
 

Pook

Registered User
I very rarely see D1 on a normal days driving. Only once at start in the morning and same when driving home. Even at full stop it takes off in D2.
Ok thanks for that, that lowers my ****** pressure slightly then ha.
 

OliS3

Registered User
The S3 shifts up at 6mph from 1st to 2nd and holds 2nd till about 3mph and then always changes down to 1st. It does slip the clutch quite a bit if youre still in 2nd but never pulls off in 2nd.

I'm surprised the 7 speed is so different, unless it's because it's a dry clutch and not wet?

Sent from my SM-G935F using Tapatalk
 

Pook

Registered User
H
The S3 shifts up at 6mph from 1st to 2nd and holds 2nd till about 3mph and then always changes down to 1st. It does slip the clutch quite a bit if youre still in 2nd but never pulls off in 2nd.

I'm surprised the 7 speed is so different, unless it's because it's a dry clutch and not wet?

Sent from my SM-G935F using Tapatalk
mm, blood pressure sl-ow-ly ri-si-ng.....
 

Scottyg

Registered User
My 7 speed is up in 5th by 30mph and 7th by 45mph. Hence I average 47-50 around town and 65+ on a run. It'll hold on longer if I stick it in Sport/Dynamic but the difference is negligible unless you're booting it. Even when the SS kicks in and I set off it's straight into 2nd, not first. I'll try and get it on video the next time I'm out.
 

RichardT

Registered User
I very rarely see D1 on a normal days driving. Only once at start in the morning and same when driving home. Even at full stop it takes off in D2.
I think mine's like this as well. Pretty well always in D2 when coming to a stop. But I never see the engine stop before the car stops moving. I think it goes down to S1 when in sport, but not certain as I don't oftwn have it in sport when driving normally - only when I want to nip past something!
 

sandman112

Registered User
On the auto stop, my previous a3 diesel needed to come to a complete stop for a split second before the auto start kicked in, was reasonably easy to control with brake pressure. However my S3 auto stop kicks in just before stopping... I actually like it and find it far smoother taking off. Sometimes on the A3 it would be quite jerky when starting from auto stop unless I brought the brake up a touch to start the engine before pulling off.

Both s-tronic 6 speed
 

Pook

Registered User
On the auto stop, my previous a3 diesel needed to come to a complete stop for a split second before the auto start kicked in, was reasonably easy to control with brake pressure. However my S3 auto stop kicks in just before stopping... I actually like it and find it far smoother taking off. Sometimes on the A3 it would be quite jerky when starting from auto stop unless I brought the brake up a touch to start the engine before pulling off.

Both s-tronic 6 speed
Thanks for that. I'm not sure if it's just a lottery as to how it they work, or whether in fact they've been set up different, who knows!
 
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