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      03-04-2012, 03:11 AM   #21
E90Fleet
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Drives: BMW
Join Date: Apr 2005
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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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