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      03-02-2012, 02:56 AM   #1
E90Fleet
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Deactivating F30 Start Stop by default

For all those asking about deactivating start stop.

I have been told that the dealers service system can deactivate start stop by default to do fault finding on a car.
I have no idea if this is permanent or if it shows any warnings on the dash when done.

But for those really not liking the system, maybe someone has to go to a dealer and be a test subject to see what happens ?
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      03-02-2012, 08:05 AM   #2
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Would love to believe this is true.
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      03-03-2012, 05:52 AM   #3
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For manual cars, I think Stop/Start is good but for automatics, no. That would be brilliant if they were obliging to allow it deactivated by default!
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      03-03-2012, 09:30 AM   #4
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Again, this can be done in the coding using NCSExpert and the D-CAN cable. However, it WILL through a red flag when you go into the dealer, and they can void your warranty if they so choose. Is it really that difficult to press the button?
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      03-03-2012, 10:15 AM   #5
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I don't get why everyone is so annoyed by this. You stop, it turns off. You push the clutch, it comes back on. It's really not an issue at lights. The only time it can be silly is if you're creeping in traffic but just switch it off.
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      03-03-2012, 10:16 AM   #6
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Quote:
Originally Posted by shoptb View Post
Is it really that difficult to press the button?
If it wasn't, there wouldn't be so much buzz on the forums. The inability to memorize the setting is absolutely annoying.
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      03-03-2012, 10:33 AM   #7
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Quote:
Originally Posted by stampchez View Post
I don't get why everyone is so annoyed by this. You stop, it turns off. You push the clutch, it comes back on. It's really not an issue at lights. The only time it can be silly is if you're creeping in traffic but just switch it off.
its not as smooth in the automatics.
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      03-03-2012, 11:10 AM   #8
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Quote:
Originally Posted by stampchez
I don't get why everyone is so annoyed by this. You stop, it turns off. You push the clutch, it comes back on. It's really not an issue at lights. The only time it can be silly is if you're creeping in traffic but just switch it off.
I agree for manuals, but for automatics, its not good. Switching off at junctions, mini-roundabouts and roundabouts is unacceptable.
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      03-03-2012, 11:28 AM   #9
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What's a roundabout?
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      03-03-2012, 12:00 PM   #10
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Quote:
Originally Posted by gnosis8
What's a roundabout?
Ha, I forgot you American's don't have corners other than 90 degrees! They're great fun in a BMW, especially when they're wet . But you can't dawdle on them so Stop/Start is not good.
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      03-03-2012, 12:31 PM   #11
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I think the system will not shutdown if you have the when turned off center, as if you are preparing to turn right on red or enter a roundabout. Cannot confirm as I do not have F30 yet.

We actually had a roundabout installed in our area recently. It really relieves pressure during rush hour at this intersection without the need for a traffic light that would back things up the rest of the time. I wonder if this experiment will lead to more instances.
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      03-03-2012, 01:53 PM   #12
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Quote:
Originally Posted by SomeRandomer123 View Post
Ha, I forgot you American's don't have corners other than 90 degrees! They're great fun in a BMW, especially when they're wet . But you can't dawdle on them so Stop/Start is not good.
Oh yes.. we have roundabouts. You can always tell one is coming up by all the skid marks going up over the curb in the middle.
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      03-03-2012, 02:33 PM   #13
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Quote:
Originally Posted by gnosis8 View Post
What's a roundabout?
Its a circular anomaly inside of which there are no laws or rules and its every man for himself. If you drive into a roundabout your car will get damaged and you will eventually die.

This is of course a North American perspective of roundabouts.
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      03-03-2012, 02:54 PM   #14
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Quote:
Originally Posted by pcbrew View Post
We actually had a roundabout installed in our area recently. It really relieves pressure during rush hour at this intersection without the need for a traffic light that would back things up the rest of the time. I wonder if this experiment will lead to more instances.
Roundabouts are great aren't they! . Trouble is, they rely on people knowing how to use them, and lots of road planners see how well they work in the UK and put them up elsewhere in the world and while they work in some places, in others they cause chaos - they've put some up in parts of the Middle East and there they're like Death Ralley!

Quote:
Originally Posted by Weaselboy View Post
Oh yes.. we have roundabouts. You can always tell one is coming up by all the skid marks going up over the curb in the middle.
lol.... I live in the only "artificial" city in the UK, ie it didn't exist before the '60s and was built and planned from scratch instead of growing organically like all our other towns & cities. It's known even here as the city of roundabouts!

Pretty much every one of the junctions between the yellow roads on this map is a roundabout, as are most of hte other junctions:

http://maps.google.com/maps?q=milton...rce=gplus-ogsb

They're pretty big, and you can easily go into one at 40mph when you can see the coast is clear:

http://maps.google.com/maps?q=milton...rce=gplus-ogsb

The great thing is that when there's no traffic you can get from one side of town to the other really quickly - and even during rush hour the delays are nothing compared with what our other towns & cities suffer from.
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      03-04-2012, 12:16 AM   #15
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Quote:
Originally Posted by shoptb View Post
Again, this can be done in the coding using NCSExpert and the D-CAN cable. However, it WILL through a red flag when you go into the dealer, and they can void your warranty if they so choose. Is it really that difficult to press the button?
Warranty void, not likely.

Unless specifically stated in your warranty manual, this is not likely to happen. Turning off a system that can be turned off is not a "mod" per se.
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      03-04-2012, 01:08 AM   #16
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Also, there are quite a few variables that have to be met in order for Auto-Off to engage even when it is on. For instance:

If the engine has not yet reached optimal temperature, AO won't engage.

If the outside temperature is below 35 degrees or above 85 degrees Fahrenheit, AO won't engage.

If the front wheels are turned more than [x] degrees, AO won't engage. (I couldn't remember the number.)

If there is too much load on the engine (i.e., AC is at max), AO won't engage.

There were roughly 10-15 circumstances where AO wouldn't activate even if it was left "on".

I don't remember all of them, but there's probably something written more about these exceptions on one of BMW's websites.
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      03-04-2012, 01:38 AM   #17
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There are also a mechanism to defeat it on a per-stop basis:
Manual Transmission : keep the clutch pedal down (disengaged)
Auto Transmission: Press the brake hard and then release to normal pressure.
Also can switch from D to M/S (manual shift mode) or turn the wheels to re-start the engine without releasing the brake.
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      03-04-2012, 02:11 AM   #18
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I think that for temps above 80 F outside, this function should deactivate so the reduced AC doesn't make it too hot in the cabin
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      03-04-2012, 03:05 AM   #19
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Quote:
Originally Posted by E46M54325Ci View Post
I think that for temps above 80 F outside, this function should deactivate so the reduced AC doesn't make it too hot in the cabin
During my test drive, with temps of about 85-86 F outside, the engine turned automatically back on if the temperature became too hot inside so basically it wouldn't have to be deactivated.
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      03-04-2012, 03:23 AM   #20
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Quote:
Originally Posted by stampchez View Post
I don't get why everyone is so annoyed by this.
Because several people have experienced a problem with it. Their engines are sometimes not turning back on. It happened three times while the Motor Trend editors were testing their car. And other forum readers have experienced the same thing.

See thread here: http://www.f30post.com/forums/showthread.php?t=655588
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      03-04-2012, 04:11 AM   #21
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Quote:
Originally Posted by Goody4 View Post
Also, there are quite a few variables that have to be met in order for Auto-Off to engage even when it is on. For instance:

If the engine has not yet reached optimal temperature, AO won't engage.

If the outside temperature is below 35 degrees or above 85 degrees Fahrenheit, AO won't engage.

If the front wheels are turned more than [x] degrees, AO won't engage. (I couldn't remember the number.)

If there is too much load on the engine (i.e., AC is at max), AO won't engage.

There were roughly 10-15 circumstances where AO wouldn't activate even if it was left "on".

I don't remember all of them, but there's probably something written more about these exceptions on one of BMW's websites.
Here is the list i have posted numerous times

Stop Start wont engage if :

a) Outside temperature is below 37F (3C)
b) Outside temperature is above 95F (35C)
c) Car interior has not yet cooled or warmd up
d) Engine not yet warmed up (does not have to reach full operating temp)
e) Battery charge low
f) Directly after car was driven in reverse
g) Stering wheel is turned after car has stoped
h) Stop and Go traffic
i) Gear selector in Sport or Manual
j) ABS was activated before stopping
k) Windshield is fogging up
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      03-04-2012, 04:14 AM   #22
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Quote:
Originally Posted by E46M54325Ci View Post
I think that for temps above 80 F outside, this function should deactivate so the reduced AC doesn't make it too hot in the cabin
It deactivates above 95F
Below that the new Cold Storage evaporator uses a specioal frozen coolant to keep the AC running with the engine off.
If it is not frozen yet or if it can not cope, the car will automatically restart the engine.
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