fganter

Hi, all,

In general, I like the blind spot assist in my 2014 E350. However, I've identified two scenarios where it beeps when it probably should not be...
1. On a 6 lane highway, when I start changing from the right-most lane to the middle lane (using my turn signal), it will start beeping as soon as I enter the middle lane. Yes, there is a car in the left-most lane, but beeping as soon as I start entering the middle lane?? I think the same happens changing right lanes but am not 100% sure.
2. When there are quite a few cars around and we're moving, it will beep, then immediately beep again, then immediately beep again even when there is no erratic driving or lane changes going on around me.

Is this a sensor issue or a system firmware update issue (or something else)?

Thanks for your help.

KEY08

These are not random beeps without using your turn indicator? Or, in every case you are signaling?

kajtek1

It should not beep unless you turn your blinker on?
Unless it is front radar that detects possible collision
The system is oversensitive and I hear the beeps very often.
But better 1000 beeps too many, than 1 not enough.

fganter

For scenario 1, yes, turn signal always on.

For scenario 2, no turn signal - just minding my own business in my lane.

KEY08

Yeah, it should only warn when signaling. Making a left turn in a multi-lane turn intersection is annoying when in the right-most lane. You need it diagnosed as your hand held scan tool is worthless.

Arrie

I had this problem very soon after I got my current car. It was giving collision warnings when no such even was happening. They found a bad side radar sensor that was replaced.

Obviously the blind spot function beeps when blinker is on and someone is in the spot on that side but it seems the system uses the blind spot sensors also for collision monitoring in the sides.

The false alarms were the beeps with the red triangle flashing in the cluster, not the red triangles in the mirrors.

TeeEl

For issue number 1, I have the same problem but usually the other car is closer. I'll merge from lane three into lane two, and there will be a car in lane one. That type of thing.

For issue number 2, my "warning" comes on FAR too often when I'm in a drive through. (Starbucks seems to be the worst.) Stationary, no blinker, beeeeeeeep. Shut up you daft ****ing car! One of my very few complaints about the car.

KEY08

Do you have Parktronic? That may be the cause of your beeps in close proximity to cars, buildings, pick-up window, baristas, etc

Arrie

For issue 1 your car is working like it is supposed to work if the warning comes with the blinker ON. The system sees the car in lane one as it is supposed to see it when you enter lane 2 with the blinker flashing. You are getting the blind spot warning and all is good.

Issue 2 is probably what KEY08 said, your Parktronic, which also sees little bit to sides and not just directly in front. When you drive very close to a wall, like you do at drive thru, you can get alarm from the Parktronic just as it supposed to work. My Parktronic also gives warning if I'm too close to a wall. It also sees some of those concrete parking stall stoppers, which is good so I can keep my front from getting on them.

Next time at Starbucks leave your car 1/2 ft further from the wall and see what happens.