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Old 08-14-2012, 07:35 AM
boltjaM3s boltjaM3s is offline
Location: USA
Join Date: Nov 2009
Posts: 9,049
Mein Auto: BMW M428i
Originally Posted by bradlexxxxx
We just recently took delivery of a 2013 X2 28i with the new N20 engine; also equipped with ASS (not sure on the generation). The problem I have with ASS is three fold:

1) If you drive around town where there are a lot of stop signs, you end up experiencing a whole lot of stop-start action. At a stop sign, you only stop briefly. If you're obeying the law, you come to a complete stop, which means you must wait for the car to "settle". If you combine this with taking just a moment to check for oncoming traffic in both directions, you end up with a very brief stop-start cycle that is very apparent from the passenger area (the whole car shudders). My father insisted that something was wrong with our brand new car after experiencing it only one time.

2) Even if the first matter is simply an annoyance, I have now experienced more than one occasion where the engine failed to start in these abrupt engagements. This left the car in D, unable to restart until you follow a specific procedure: apply brake, engage P, press start button. This procedure seems simple, but when you're sitting in traffic trying to figure out why your car isn't moving when you press the gas pedal, it's incredibly frustrating.

3) The stop-start procedure is disruptive to the passengers in our X3 with the 8-speed auto transmission. When the engine disengages, I can feel the car settle back. When it restarts (often triggered while I'm still stopped because of climate control needs), I can feel the car lunge forward. It's unsettling and elicits strange looks from the people around me at the signal light. Call me self-conscious, but I really don't want people staring at me at signal lights because my car keeps turning on and off.
Originally Posted by sekxxx
It interferes with my regular driving because my car has stalled twice in traffic the first three weeks I've had the car. I now always shut it off when I start my car. To me, getting slightly better gas mileage does not equate with the possibility of not knowing when I'll have to manually restart the engine but knowing for sure that sooner or later, I will. That possibility occurs not because of anything I've done but because the manufacturer has provided a feature that defaults to a system that occasionally fails to work.

I know that pushing a button to override this feature when I start the car is no big deal. But I do know that I shouldn't even have to do that. For that reason, I definitely want the update to the last user mode.
Originally Posted by Frogxxx
I found that I was dreading coming to a stop to see how much the engine would shake the car when ASS stops the engine. Sometimes it's as smooth as silk and I think hey, this is great, and then other times it's so violent that I think the engine is going to rip itself out of the mounts. Plus, as was said before, the car lurches when this happens and everyone it the cars feels it.

Same on restart; sometimes it's really smooth, and other times it's really rough. No real pattern.

Then, once, I was in a intersection ASS stalled the engine on restart.

I was stopped in the intersection, ASS kicked in, I let my foot off the brake, and the engine stalled. The iDrive bings with a fault saying that ASS failed, I had to scramble to re-press the brake, push the start button, then press the throttle to go and end up just reving the engine. Looked at the shifter and realized that the car put itself in NEUTRAL! My adrenaline is pumping like crazy while I selected drive while getting honked at by people behind me. This is not something I want to repeat and definitely not something I want my wife to deal with!

So, I coded my car to remember the last ASS setting and I leave the dang thing off; I couldn't be happier. I don't worry about my engine stalling or shaking, or lurching any more.

If BMW can address these issues, I'd be the first to re-enable ASS, but not the way it works now.
Originally Posted by lawxxxx
Wow, this is crazy. And this isn't the first story I've heard like this. It's only by sheer provenance no one has been seriously injured or killed due to this. The fact that they have to program in a message that says "A.S.S. failed" means it shouldn't even be an option. If this were to happen at an intersection in which you are on a slight downhill you may find yourself rolled into the middle of the intersection trying to figure out what's wrong with the car.

BTW, if they can figure this out on golf carts why can't they do it on a $50k car?
Bumping this as it fell to the end of Page 1. Multiple F30 owners in another forum reporting unexpected stalls. If you're not going to get the firmware update at the dealer be cautious in using the ASS feature until it's been sorted.

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