Start/Stop

[RUM4MO]

I disabled mine in VCDS only because when I get out of my car to open or close the garage door it shuts off and requires a key restart. It should be smart enough to stay "on" in park (DSG.)

Yes that part of Stop/Start is annoying, I think that it is same with man trans (forgotten, tend to have a wife that gets out and opens garage door!), but I'm sure that it is there for safety reasons, though I'd guess even man trans will not restart if the car had been left in gear. Probably another reason to get going with fitting a garage door opener - one of my "must dos" but I think that I'll need to move some strip lights out of the way!!

One thing that I don't know as I've never had a DSG equip'd car is, when you are at a junction waiting for a gap, can't the car be left in drive and the handbrake applied? If so, then what is the issue about response time from engine, when I am at a junction waiting for a slot to move into, I don't hold the car on the foot brake - that is just being selfish to following drivers - I have the handbrake on, neutral selected and foot off clutch, in that situation, I've never failed to get moving as quickly as I would have if I did not have Stop/Start. When exactly does the engine restart with DSG?

[KiwiME]

... can't the car be left in drive and the handbrake applied? If so, then what is the issue about response time from engine, when I am at a junction waiting for a slot to move into, I don't hold the car on the foot brake - that is just being selfish to following drivers - I have the handbrake on, neutral selected and foot off clutch, in that situation, I've never failed to get moving as quickly as I would have if I did not have Stop/Start. When exactly does the engine restart with DSG?

Yep, that's what I do as well in a manual car, as long as I'm sure the person behind won't mistake the lack of brake lights as a cue to go.

For some reason that presently eludes me, the DSG does not sense that the handbrake is on and tries to fight it aggressively after about 2 seconds once you take your foot off the brake. It will overcome it and once the car almost drove itself into a parked car when I got out with the handbrake "on", but accidentally still in reverse.

The dealer told me it's the "hill-hold" feature, which I don't buy as that works perfectly well and automatically without any need to use the hand brake.

At red lights I have my foot firmly on the brake. If I select N or P, I can use the hand brake but then have to press the foot brake again to put it into D, making it too much trouble unless it's a long stop.

I think the engine restarts when you relax the foot brake, but barely recall as S-S been permanently disabled on my car for nearly a year now and I really don't miss it.

[RUM4MO]

That is crazy, surely VAG and others have worked out how these systems need to work for people to be "okay" with them?

[JohnPolo]

I have a GTI DSG and start stop is fine! If I was about to pull out into traffic from just getting to a junction I'd use just enough force to stop the car with the brake but not enough to trigger stop/start.

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[Daversmth]

My daughter has a 6C 1.2 DSG and has reported that very rarely , when stopped with the stop/start active, and engined stopped due to foot on the brake, when the brake is released the engine does not restart. A message to restart the car manually appears. This happened to me too yesterday when driving it.

It is a very rare occurence but nonetheless potentially dangerous.

Has anyone else experienced this or have any ideas of a possible cause?

[RUM4MO]

I think that I have now understood what I thought should happen is wrong as DSG is an automated manual gearbox so it does not have a fluid flywheel, which is the part that tolerates being in drive at idle with handbrake on and not fighting to move.

Edit:- my wife has a manual gearbox car and I've found that if you accidentally stall it, it will restart when you dip the clutch - I think.

[EDI GTI]

I think that I have now understood what I thought should happen is wrong as DSG is an automated manual gearbox so it does not have a fluid flywheel, which is the part that tolerates being in drive at idle with handbrake on and not fighting to move.

Edit:- my wife has a manual gearbox car and I've found that if you accidentally stall it, it will restart when you dip the clutch - I think.

In the manual if you stall then yes, depressing the clutch will restart the car without having to turn the key, it does however seem to take its time to do it, usually around 3-5 seconds of just sitting red faced!

[iichel]

I have also observed some odd behaviour of the start/stop, requiring a manual restart.
It sometimes occurs when the engine shuts itself off for prolonged periods or when a door is opened. Manual 6R 1.2 TDI.

[RUM4MO]

In the manual if you stall then yes, depressing the clutch will restart the car without having to turn the key, it does however seem to take its time to do it, usually around 3-5 seconds of just sitting red faced!

I think in my case, confusion/shock kicks in and while doing the right thing in dipping the clutch pedal down and starting to move my hand to the ignition key, things have sorted themselves out!

[RUM4MO]

Well, on this topic, I've just noticed that if I allow my wife's August 2015 to auto Stop/Start, it does not, which was a bit strange, my wife said that she had noticed this as she typically leaves the auto Stop/Start enabled. So I clamped my CTEK battery tester across the battery and it said "battery good" 12.9V and 625AH EN - this rating should be 640AH EN but this tester only has 25AH steps, so that battery is still okay, but when I looked closely, the load/condition monitoring lead was not connected to the sensor on the battery -ve post, I used a torch light and found it and plugged it back in. All I can say is "main dealer specialists/techs" - why don't they give their work a quick check over - the battery had been removed from that car about 2 weeks ago to replace the gearbox top mounting!!

Edit:- I'd think the MPG over that period will be slightly down on what it should have been.

[iichel]

Interesting, a quick scan with a diagnostic tool should have revealed that (clumsy) mistake.

[RUM4MO]

It was a warranty repair so I'd doubt if any diagnostics tools were involved, no time/money for that?

[iichel]

I think (or maybe hope) that warranty repairs are performed at the same level of quality was the normal repairs.

[RUM4MO]

Well a few years ago, I used a proper Audi approved bodyshop to sort out some scratches on my S4, when I next serviced that car I discovered quite a few logged faults, all relating to the bodyshop removing the rear bumper and driver's door mirror - and not bothering to clear all logged faults, I was a bit annoyed about that, but a bit too late to talk to them about it!

[iichel]

Yeah, I can agree on that. I can understand a bodyshop not taking a diagnostic tool in use.

However, as I understood from your adventure with the gearbox mount, the problem was solved at a VW dealer and not at a bodyshop. After disconnecting the battery, air filter, MAF sensor, maybe some wiring looms, I think it would be good to check the relevant ecus for errors. But maybe I'm a bit too wishful here.