[DF]

I was driving in to my parking garage and the car thought I was about to hit something. I heard a chime and the the brakes clamped down.

Anyone have it just randomly?

I also turned off the stop start. Way too annoying

[Elvisfan]

Originally Posted by DF

I was driving in to my parking garage and the car thought I was about to hit something. I heard a chime and the the brakes clamped down.

Anyone have it just randomly?

I also turned off the stop start. Way too annoying

I also turned off stop start.

[siwo]

Yes, I turn off the stop-start function. I've had an LED indicator on my dash show the front collision warning light but never experienced a plausible crash warranting the system to engage. But then again, I've only driven the car for 5 days only.

[Kiwi]

The system reads the rear stop lights of cars you are following and it could have read a set slightly around corner or even parked if you are close enough.

[Elvisfan]

Originally Posted by Kiwi

The system reads the rear stop lights of cars you are following and it could have read a set slightly around corner or even parked if you are close enough.

How do you know that? I can't imagine it doing the brake lights alone. That would be useless for cross traffic. Or a stalled car. Or a car doing 50 in a 65 zone.

[BoomWasabi]

I have several false positives when the car activated brakes:

1. Driving at night on a city street at low speed (20mph) approaching pedestrian crossing that was marked by a set of reflecting sticks on each side (like this) . Car suddenly engaged brakes on the empty crosswalk. My guess is that headlights reflections appeared as someone is approaching the crossing and car reacted.

2. Driving at 45 mph on empty road in the middle of the day in the fall. I think a fallen leaf floated near the camera, and car had to prevent a collision with the leaf.

3. Driving fast on a hilly road. It tried to brake not recognizing that it is the pavement that going up.

[Rayscott]

Not a fan of this technology. I have never caused a rear end accident in the 56 years I have been driving. I use my eyes and pay attention.

[Elvisfan]

Originally Posted by Rayscott

Not a fan of this technology. I have never caused a rear end accident in the 56 years I have been driving. I use my eyes and pay attention.

I don't have it on my bimmer. Didn't see any cars that had that option package. However,my wife's Acura has the passive system. It just beeps and flashes "brake". There have been several false alerts. It's not ready. I would like to have blind spot detection. I'm not here to discuss pros and cons. It's already been discussed. I would just like to have it.

[Zooks527]

Originally Posted by Kiwi

The system reads the rear stop lights of cars you are following and it could have read a set slightly around corner or even parked if you are close enough.

Not quite.

The object collision system does use the camera in rearview the mirror mount, as shown in the manual. It provides object recognition and distance approximation, not light sensing, which is why it will warn on approaching too fast / following too close to car with its tail lights off, as well as recognize and brake for pedestrians.

[redontheline]

Originally Posted by Elvisfan

I don't have it on my bimmer. Didn't see any cars that had that option package. However,my wife's Acura has the passive system. It just beeps and flashes "brake". There have been several false alerts. It's not ready. I would like to have blind spot detection. I'm not here to discuss pros and cons. It's already been discussed. I would just like to have it.

Not trying to talk the sensors down or lobby in any way, but nothing improved my driving confidence more than angling the wing mirrors way out as described in the article that floats around here all the time. With my setup, there is no blind spot to monitor.

I don't think I will ever pay to option active driver assistance.

[Tpeterson]

I hope the engineers work those kind of bugs out of autonomous driving cars before they foist them on the public.

[raleedy]

I've benefitted at least once from the collision alert -- light and beep, not braking. It's easy enough to be distracted, especially in an unfamiliar environment. I'll accept the flaws in the current system. And start/stop saves fuel and reduces emissions. What's not to like about that?

[Elvisfan]

Originally Posted by redontheline

Not trying to talk the sensors down or lobby in any way, but nothing improved my driving confidence more than angling the wing mirrors way out as described in the article that floats around here all the time. With my setup, there is no blind spot to monitor.

I don't think I will ever pay to option active driver assistance.

Once in awhile I miss something. No ones perfect. The warning after I hit the signal has probably saved me a few times. That's on my wife's car.
P.s. The blind spot whet you are pulling out of a driveway,with the top up is really bad on the right side.

[Rayscott]

Originally Posted by Elvisfan

Once in awhile I miss something. No ones perfect. The warning after I hit the signal has probably saved me a few times. That's on my wife's car.
P.s. The blind spot whet you are pulling out of a driveway,with the top up is really bad on the right side.

That was my concern with our new 228ixvert. A friend who manages Sound FX installed a small camera under each mirror which detects vehicles in the blind spot when you turn on your signals then it shows the vehicle on the nag screen. Also there are 2 infra red sensors in the bumper which gives an audible alert and flashing light on the dash to back up the cameras if you are not using the turn signals. The cameras have 2 small led lights which light up the image at night. The blind spot when the top is up and the head rests create an awful blind spot. With drivers today you need to be able to see them.

[Elvisfan]

Originally Posted by raleedy

I've benefitted at least once from the collision alert -- light and beep, not braking. It's easy enough to be distracted, especially in an unfamiliar environment. I'll accept the flaws in the current system. And start/stop saves fuel and reduces emissions. What's not to like about that?

Durability issues. I picture the same scenario as direct injection. I don't remember one ad stating. Direct injection decreases emissions and saves fuel. By the way,at 40,000 miles or so,your engine will have to be taken apart and valves cleaned. It's too new to know how long before starters are going to have to be replaced. Starters usually last the life of the car. With starters being used 2 or 3 or 4 times on most days. Now you have starters being used 50 or 60 times a day in big city traffic. Or more. I will use it if I am caught by a train or something. Otherwise it stays off.

[Rayscott]

Originally Posted by Elvisfan

Durability issues. I picture the same scenario as direct injection. I don't remember one ad stating. Direct injection decreases emissions and saves fuel. By the way,at 40,000 miles or so,your engine will have to be taken apart and valves cleaned. It's too new to know how long before starters are going to have to be replaced. Starters usually last the life of the car. With starters being used 2 or 3 or 4 times on most days. Now you have starters being used 50 or 60 times a day in big city traffic. Or more. I will use it if I am caught by a train or something. Otherwise it stays off.

I was debating this issue but have now decided to turn it off after your analysis. thanks.

[Elvisfan]

Originally Posted by Rayscott

I was debating this issue but have now decided to turn it off after your analysis. thanks.

You're welcome. While it's true that it would probably be covered under warranty. It still could be a pain.

[Beartato]

Originally Posted by Elvisfan

Durability issues. I picture the same scenario as direct injection. I don't remember one ad stating. Direct injection decreases emissions and saves fuel. By the way,at 40,000 miles or so,your engine will have to be taken apart and valves cleaned. It's too new to know how long before starters are going to have to be replaced. Starters usually last the life of the car. With starters being used 2 or 3 or 4 times on most days. Now you have starters being used 50 or 60 times a day in big city traffic. Or more. I will use it if I am caught by a train or something. Otherwise it stays off.

I was under the impression the starter is more robust for auto start/stop. You don't think the engineers knew what they were doing when they designed the system?

[Zooks527]

Originally Posted by Beartato

I was under the impression the starter is more robust for auto start/stop. You don't think the engineers knew what they were doing when they designed the system?

I think they knew that they were meeting arbitrarily mandated fuel economy figures. The government doesn't care if your car is less reliable or costs more. The government only cares that its edicts are obeyed.

[Tpeterson]

Originally Posted by Beartato

I was under the impression the starter is more robust for auto start/stop. You don't think the engineers knew what they were doing when they designed the system?

But,how much more robust can they be? Plus,engineers aren't in control of manufacturing and engineering standards, financial people are!

[Elvisfan]

Originally Posted by Beartato

I was under the impression the starter is more robust for auto start/stop. You don't think the engineers knew what they were doing when they designed the system?

It may very well be more robust. I assume the engineers are in Germany. I have no idea what traffic is like in Germany. It's probably not like New York or LA or Chicago. Perhaps they did and I am all wrong. Did engineers know their direct injection systems would need expensive maintenance. Or did they care? Only time will tell. Remember,in the US it's all about MPG.

[rich8566]

Originally Posted by Beartato

I was under the impression the starter is more robust for auto start/stop. You don't think the engineers knew what they were doing when they designed the system?

Not sure if the starters are more robust but my owners manual states that use of the start stop function increases wear and tear on the starter. That convinced me to deactivate the start stop function. I cannot imagine saving enough fuel over the life of the vehicle to even come close to paying for BMW to replace my out of warranty starter.