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Start / Stop on TDI

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Old 08-16-2014, 06:28 AM   #1
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Default Start / Stop on TDI

I'm new to this technology and so far am pretty impressed with how quick it goes from the stopped position to the start... However, wondering how well it works in hills especially some steep ones in San Francisco? I notice from other forums and posts that this is not new technology as it is quite prevelant outside the US. Has anyone heard of any issues with this technology? Such as transmission or engine issues etc...?

I do a lot of in town driving which consists of a lot of stop signs and stop signals and sometimes get a bit annoyed with the technology since as stop signs we have to stop and go so much etc....

I know I can disable it but just curious on of people use the start / stop function or not and experiences both in town and on steep hills.
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Old 08-16-2014, 08:45 AM   #2
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I haven't had any problems with mine, but I've only owned it for a year. I used the button to shut it off when I need to, and after you get used to it, you'll be able to modulate the brake pedal pretty well to keep it from shutting off if that's what your looking for.
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Old 08-16-2014, 03:47 PM   #3
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Quote:
Originally Posted by imdakine1 View Post
I'm new to this technology and so far am pretty impressed with how quick it goes from the stopped position to the start... However, wondering how well it works in hills especially some steep ones in San Francisco? I notice from other forums and posts that this is not new technology as it is quite prevelant outside the US. Has anyone heard of any issues with this technology? Such as transmission or engine issues etc...?

I do a lot of in town driving which consists of a lot of stop signs and stop signals and sometimes get a bit annoyed with the technology since as stop signs we have to stop and go so much etc....

I know I can disable it but just curious on of people use the start / stop function or not and experiences both in town and on steep hills.
I've used this on an manual shift Audi A3 and on Golf DSG . Using a manual , releasing the clutch while the gear is in neutral will activate the STOP and pressing the clutch in will activate the START. It's pretty instant, but at times you can get caught out at traffic lights. I've had this happen a few times, where you are just about to slow down and stop, but then want to start off again, the car STOPS and then you have to press the clutch in again to START. It's just a matter of getting used to not shifting it into neutral.

On the Golf DSG though, the STOP START is terrible, it will only start when you take the foot off the brake pedal and then touch the accelerator. This is so tedious as you're worried the car may launch off if you press on the accelerator too much.

On the Audi S-tronic gearbox, though the START happens the instant you release the foot off the brake , so it's ready for you before you even touch the accelerator. If you have the hill assist / electronic handbrake, then it helps as well.
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Old 08-16-2014, 03:56 PM   #4
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Not sure about the Audi yet because mine is still on order but I do know that in the BMW X3/X5 owners manual it states that use of the start stop technology may cause premature wear on certain engine parts. I was wondering if Audi has the same weasel language. I am very suspect of this but when I asked the dealer they stated that the starter and other parts were "beefed up" to take the extra wear that will happen with start stop.
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Old 08-16-2014, 07:46 PM   #5
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Turned it off when leaving the dealership last fall- thank God it doesn't default to on every time you start the car. I can't stand that "feature."
My son had a BMW with that and it defaulted to on every time you turned the car off and on. I find it very irritating- if I have to accelerate quickly from a stop etc I want the engine RUNNING!!
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Old 08-17-2014, 05:04 AM   #6
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I've used it since taking delivery, and I don't mind it at all .. Actually what I'd be most interested in would be an actual study of how much gas is saved by this technology.
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Old 08-17-2014, 05:49 AM   #7
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@eryeal... I agree it would be interesting to know how much gas is saved. I'm still in my first tank of gas with my TDI and have kept it on. I'm getting used to it and am learning to brake / stop in a way that of I am able to have it not shut off when I have a stop sign with three or four other cars in front and cross traffic etc....

Does anyone know if turning the start/stop can only happen at the beginning or in park mode or if I run into a large hill with a lot of cars if u could turn it off either while stopped in drive mode...?
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Old 08-17-2014, 08:27 AM   #8
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you can shut it off anytime you feel necessary.
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Old 08-17-2014, 05:16 PM   #9
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Originally Posted by imdakine1 View Post
@eryeal... I agree it would be interesting to know how much gas is saved. I'm still in my first tank of gas with my TDI and have kept it on. I'm getting used to it and am learning to brake / stop in a way that of I am able to have it not shut off when I have a stop sign with three or four other cars in front and cross traffic etc....

Does anyone know if turning the start/stop can only happen at the beginning or in park mode or if I run into a large hill with a lot of cars if u could turn it off either while stopped in drive mode...?
There was a recent article in one of the major newspapers quoting a test from some testing body (CR?) in which they tested several different manufacturer's cars. They used the same driving cycle both with and without the technology activated. If I can remember correctly, the net was a 7% savings in fuel economy across the board. Their opinion was that the technology was worthwhile. I'm sure you can find the article with a google search.
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Old 08-17-2014, 10:06 PM   #10
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I'm assuming the TDI and other start / stop vehicles use a different battery that will compensate for the engine starting & stopping so much etc...? Does anyone know how this has been addressed? What is the expected battery life for a car and is it the same amount of time for the Q5 TDI and other start / stop cars???
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Old 08-18-2014, 05:51 AM   #11
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Quote:
Originally Posted by imdakine1 View Post
I'm new to this technology and so far am pretty impressed with how quick it goes from the stopped position to the start... However, wondering how well it works in hills especially some steep ones in San Francisco? I notice from other forums and posts that this is not new technology as it is quite prevelant outside the US. Has anyone heard of any issues with this technology? Such as transmission or engine issues etc...?
I haven't seen anyone posting about start-stop-related issues, and it's been the default on pretty much all engines in Europe for years, I believe, so presumably we'd've seen something if there was a substantial issue.

As for SF, I could see it being difficult to modulate the pedal properly for some of the stop signs in the hills, but I wouldn't anticipate there being a problem with it activating as the engine comes back really quickly and you can start moving as soon as your foot is able to get to the gas pedal. Personally, I'd probably hit the button to deactivate it while there, though, just to have one less things to worry about since those hills always freaked me out when I've been there.

Quote:
Originally Posted by imdakine1 View Post
I'm assuming the TDI and other start / stop vehicles use a different battery that will compensate for the engine starting & stopping so much etc...? Does anyone know how this has been addressed? What is the expected battery life for a car and is it the same amount of time for the Q5 TDI and other start / stop cars???
Start-stop-equipped cars have a heavy-duty battery to handle the additional start cycles and to power all the extra stuff while the engine's off. Lifetime sounds like it should be at least as long as a standard battery, though as it's heavier-duty it'll be more expensive to replace when it comes time.
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Old 08-18-2014, 12:44 PM   #12
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I haven't had any problems with mine, but I've only owned it for a year. I used the button to shut it off when I need to, and after you get used to it, you'll be able to modulate the brake pedal pretty well to keep it from shutting off if that's what your looking for.
- Not much more to add, I assume that's the way its supposed to be used for.
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Old 08-24-2014, 11:35 PM   #13
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Turned it off when leaving the dealership last fall- thank God it doesn't default to on every time you start the car. I can't stand that "feature."
My son had a BMW with that and it defaulted to on every time you turned the car off and on. I find it very irritating- if I have to accelerate quickly from a stop etc I want the engine RUNNING!!
Audi and VW default to ON after restarting the car. Pretty annoying I know , you have to remember to press the AUTO STOP / START button each time to turn it off. Wish there was a setting in the MMI that allowed you to turn it off.
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Old 08-24-2014, 11:47 PM   #14
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Quote:
Originally Posted by imdakine1 View Post
I'm assuming the TDI and other start / stop vehicles use a different battery that will compensate for the engine starting & stopping so much etc...? Does anyone know how this has been addressed? What is the expected battery life for a car and is it the same amount of time for the Q5 TDI and other start / stop cars???
I've used it from new on a VW Touran 2.0 TDI manual (used 9k miles) and from new on an Audi A3 2.0 TDI manual (used 4k miles) and have had no issues from new using it. However on the VW , it's such an annoyance as the car tends to kick into the STOP mode at just he most awkward moments. When you're pulling up to to a set of traffic lights and it stops for a second , you end up having to double de-clutch to restart the engine if you're just wanting to pull off as it stops. I've had many times when the car has stalled on me at the worst moment at a traffic light junction.

Also, the on the VW, the daytime (non LED) running lights or even headlights (when they are on at night) , flicker when the engine restarts. It's such an annoyance, the internal radio doesn't get affected but the fact the lights dim really gets me. This doesn't happen at all on my A3.

I'm not that bothered now, as I'll be part-exing the Touran for a new Q5 this September 1st.
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Old 08-25-2014, 04:52 AM   #15
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I read an article recently that buyers, in the U.S. haven't warmed up to start/stop technology yet. Maybe that will change, but so far not so much.
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Old 08-25-2014, 05:47 AM   #16
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Originally Posted by sbarlas View Post
Audi and VW default to ON after restarting the car. Pretty annoying I know , you have to remember to press the AUTO STOP / START button each time to turn it off. Wish there was a setting in the MMI that allowed you to turn it off.
Here in the US it doesn't force itself back on, so there's certainly something somewhere that is controlling whether it remembers the setting. I'm sure it's something in the car's firmware and not a configuration option, though. Most likely there's some sort of regulatory reason for them not giving you the option.
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Old 08-25-2014, 08:10 PM   #17
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Could it be a VAG-COM mod like so many of the other international settings?
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Old 08-26-2014, 02:07 AM   #18
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Here in the US it doesn't force itself back on, so there's certainly something somewhere that is controlling whether it remembers the setting. I'm sure it's something in the car's firmware and not a configuration option, though. Most likely there's some sort of regulatory reason for them not giving you the option.
In the UK CO2 emissions are linked to the yearly road tax you pay for the car. As STOP/START allows manufacturers to publish reduced emissions figures it's more than likely the reason why it gets switched on by default. You're most likely correct that it's a firmware setting rather than a configurable setting.
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Old 08-26-2014, 08:47 AM   #19
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Tried it going from the dealer to my place when I got the car, and turned it off when I got home. It's been off since then... It's annoying, saves 2$ of gas per year while wearing out your starter.
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Old 08-26-2014, 09:19 AM   #20
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I first came across it a previous boss's VW Passat I was more than 20 years ago back in England. I was literally shocked and asked him to tell me more about it. Then I realized what an obvious thing it is to have.

I asked my sales guy about it too and he said that the starters on the Audi's with this feature are a different model than the usual one and good for about 250k starts.

Can't see getting anywhere near that with my commute. He said that regular starters can handle about 50k so that should help reassure folks worrying about the starter 'wearing out' some. So, was glad to see it my '14 TDI.
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Old 08-26-2014, 09:19 AM
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