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auto-start-stop default setting

richardfleming

richardfleming

PCGB Member
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I've noticed my auto-start-stop button is getting a bit worn - probably because the previous owner and me press it every time we start the car. It's noticeably shinier than the other buttons now
Is there a way to set the default to not auto-start-stop the engine so you have to press the button only when you want it?
I don't do a lot of city driving, mostly A/B roads and motorways - so all auto-start does is irritate me at roundabouts or junctions?

 
There is no user accessible setting but if you take it your OPC they can re-programme so that the default is "Off".

 
Thanks folks, will give OPC a try and see what they say

(I have a horrible feeling it'll be some environmental policy thing that prevents that - but will try and report back)


 
An OPC is definitely the way it can be done. My current car and its predecessor have both been converted to default "off" because it is just not good enough to work efficiently in traffic.
 
I had mine done by the OPC by asking nicely at an opportune time but I got the impression it was a bit ‘unofficial’.
 
I alternate sport button and auto start as they both stop the cut out
and with that I get the extra fun of sport exhaust??
 
My OPC first said that it could not be done but when I insisted that it could they stated that this would invalidate the warranty as well as the EU type certificate even though I don't live in the EU.

Useless and possibly dangerous feature which I argued would accelerate wear on battery starter components etc. but no response
 
It’s not quite that useless as when engaged ie default, the coasting function is enabled which has a significant impact on fuel efficiency which translates to a greater range before having to fill up. As for wear on the battery starter components etc. being accelerated do you have evidence to support your assertion as well as it being a dangerous feature?
 
I don't have any issue with the ASS (just read this back - no pun intended!) - it's dead easy to turn on and off. On motorways or A roads the coasting function is a great feature for efficiency, and in queuing traffic where the stops are more than a few seconds the stop-start is no inconvenience at all and will have an impact on fuel efficiency too. I always turn it off in town driving as it is a pain when stops are only a moment or two, and when enjoying a drive on quieter roads I usually have sport mode on and that turns it off anyway. So all in all no problem and I don't even think about it as turning it off becomes automatic the first time it kicks in when not wanted.
 
update on this - tried OPC to have it disabled and they interestingly said it used to be possible but is not possible any longer. So hey ho. Back to button pressing. Car is in having some other stuff done and interesting thing on that - separate thread for that one I think.

thanks for the help once again everyone, appreciated.


 
Just a thought given it’s not appeared in the discussion thus far. I have had a similar issue with Panameras in changing from a 2010 4 which my OPC programmed ASS default off to a 2014 GTS which the OPC could not do the same for reasons as described in posts above
In practice I have found that easing to a very gentle pedal brake pressure when coming to standstill does not trigger ASS but is sufficient to prevent the car "creeping” with PDK. This may help avoid having to head for the button press for very short stops but clearly needs to be appropriate for the occasion.
Do you see the same characteristic on the 991 ?
 
Stephen - yes, the 991.2 will behave like you describe, but in practice it's very difficult (for me anyway) to consistently avoid pressing the brake hard enough to trigger ASS. Much easier to turn it on and off as required to use it when cruising or in a traffic jam with stops longer than a few seconds, and off for most urban driving - it's off anyway when in sport mode so no problem when driving enthusiastically.
 
BigCat said:
It’s not quite that useless as when engaged ie default, the coasting function is enabled which has a significant impact on fuel efficiency which translates to a greater range before having to fill up. As for wear on the battery starter components etc. being accelerated do you have evidence to support your assertion as well as it being a dangerous feature?
Click to expand...
Sorry about late reply, for some reason I wasn't linked into this subject.

I live in Jersey with max speed limit 40mph most roads 30 mph and some 20 and even 15, so my comments are really about considerable stop start driving although I do not use the car much here. I agree with you about coasting and it really does work on fantastic French motorways.

However our normal commute it takes half an hour to do a couple of miles and eventually if it is not turned off the battery struggles to restart and in fact eventually it starts up without any action as the battery gets lower as noted in the manual. (Battery usually connected to CTEC when not likely to be used)

As for wear on the starter motor I have not researched specifics but these things have a finite life just like any other component and instead of starting once for a journey our driving conditions require dozens. My Stop/Star is always off here. It is probably too soon to hear of premature failures in the UK.

Dangerous? yes on at least three occasions in the first month of ownership when the engine was cold the car started then stalled and the traffic behind nearly rear ended me, their fault of course but not a safe situation.

My start up "checklist" includes turning it off while checking fuel and oil pressure. Hopefully the switch will not wear out!

It should be up to the owner which settings are activated by default.
Cheers
 
I wish I had fuel pressure gauge on mine[:D]

In my daily Beemer, which has stop/start, this appears to be inhibited when the engine is cold or the ambient temp is low ( or maybe it's just the battery is low...)
Seems odd the turbo engine should stall with all the high tech stuff on it designed to prevent such things?
 
tscaptain said:
I wish I had fuel pressure gauge on mine[:D]

In my daily Beemer, which has stop/start, this appears to be inhibited when the engine is cold or the ambient temp is low ( or maybe it's just the battery is low...)
Seems odd the turbo engine should stall with all the high tech stuff on it designed to prevent such things?
Click to expand...

The software is probably Microsoft, turn it off and start again!
Come on Alan, you know what I meant, perhaps there should be a comma in there somewhere "checking fuel and oil pressure" but don't forget that English is not my first language.

Even our DA42 doesn't have a fuel pressure gauge although there is a fuel flow indicator tucked away somewhere, totally unnecessary because the ECU adjusts it automatically...so far!
Cheers
Michael
Cheers
Michael

 
Of course [:D] Even the Boeing doesn't have fuel pressure gauges.
Never had a situation in the other German car which I would say was dangerous though as a result of S/S.
 
tscaptain said:
Of course [:D] Even the Boeing doesn't have fuel pressure gauges.
Never had a situation in the other German car which I would say was dangerous though as a result of S/S.
Click to expand...

No comment, never had the privilege of flying a Boeing but they did give me a torch at Oshkosh last year

Come and live here for a while, our roads are so dangerous I mostly use the bus! Porsches and other nice marques are tailgated incessantly by hot hatches driven by people that think that they have something to prove.
Cheers
 
fireblade said:
...I live in Jersey with max speed limit 40mph most roads 30 mph and some 20 and even 15, so my comments are really about considerable stop start driving although I do not use the car much here....
Click to expand...

Michael,
Do they still hold the annual Jersey Motor Rally there? I actually won that event many moons ago - but not at 40mph though! [:D]
(Apologies to OP for going off topic.)
Regards,

Clive

 
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