Lane Departure Warning - how is it supposed to work?

[fidozoom]

I have never gotten this to work so today I did a controlled test.

I got the car to 45 mph, put it in cruise and tried to drift a little without using the turn indicators. The two arrows showed up in the central display indicating it was able to track the lanes.

When I drifted, sometimes, the arrow would go off on the side I was drifting. But I am not sure I felt the steering vibrate. Atleast I couldn't tell any difference beyond the normal vibrations of the steering wheel on rough roads and the rattling that happens when I go over the metal markers on the road. I had the steering and suspension in comfort mode. How much are you supposed to feel the vibration?

Also is there supposed to be a audible alert or only the steering feel vibration?

[Blksnowflake]

Mine vibrates abruptly and noticeably letting me know I'm drifting. I find it useful on long drives. If you activate your turn indicator then it doesn't work obviously.

[Vanc2408]

It gently vibrates as I drift over (as long as the turn signal isn't up) and then vibrates much more strongly if I drift over or signal over while someone is in my blind spot

[pokerface]

^ what he said. It does not steer or guide you in the lane like a Toyota for example...

[RickFLM4]

You get a warning if you leave the lane and a lane marking is detected. You should feel the steering wheel vibration as others have said. You can read up on it in the owner's manual too.

[SMGCFP]

My wife's Merc GLE will jerk you back...not fun. The wheel vibration is plenty to let you know you're drifting, which I do often, usually on open roads. I was trained to drive more in the middle of the road as I grew up in an area where deer liked to run in the road. I keep that off in the M4 unless like someone else stated, it's a long drive.

[xeux]

It is nice that it disables itself when the turn signal is engaged. Over all it's helpful and not intrusive.

[Budget M3]

Originally Posted by SMGCFP

I keep that off in the M4 unless like someone else stated, it's a long drive.

^^ what he said. I find it actually annoying in everyday situations like an empty on-ramp when my spirited clipping of the apex tends to use the entire paved surface and includes crossing both the inside and outside lines . Nice safety feature though for long freeway drives.