wdimagineer

Not quite. That's partly what the predictive control and predictive efficiency assist is for. The tolerance setting (as we wrote it) was designed to adapt and allow the car to vary speed on hills, etc. But it was also designed to take into consideration what you said and to adjust dynamically to limit changes.

That latter part wasn't implemented despite the data being present. Even with US navigation data my car (with my matrix lights) knows to use AFS, how to aim them, and even take them out of motorway mode before a change in speed. I've seen the metadata and I know it exists.

I don't know why this was left out. I never really handled powertrain development but I know the code base has provisions for it.

A4Driver

Speaking of people who drive too close to the cars in front of them, I'm one of those people who firmly believe in the one car length for every 10 mph rule. But on a recent trip to Maryland and Virginia, driving on I-95 and I-495, I found out that I am in the minority.

Many times I was tailgated, even when I was doing well above the speed limit. But I found out a surprisingly effective way to get annoying drivers off my tail. I put on my emergency flashers. And the looks on people's faces are priceless.

I would venture that most people on the road have never seen the B9's pulsating tail lights. When I put on the flashers, several people immediately backed way off from my car. Others look puzzled or confused, but they all made a beeline to another lane.

In my older A4s, I used to put on my rear fog lights, and people thought I was applying my brakes. But the rear fogs in the B9 are not so prominent, so the pulsating flashers do the trick.
.
.
.

Dan in St. Louis

Do that in St. Louis and the idjuts just move up closer............

superswiss

I didn't realize you worked for Audi. The owner's manual only describes the function that I described unless I missed something. Sounds like this needs some more engineering put into it. Along with the false speed limit readings. I don't think this feature as currently implemented is ready for prime time. There have been several reports of the traffic sign recognition picking up a speed limit from a neighboring street and then ACC slows the car the hell down. That's simply unacceptable and very dangerous.

lowjdml

My windshield seems to get really dirty whenever someone tailgates too closely. So I clean my windows. Oops, did your car get wet behind me?? Good!

A4Driver

Haha! Gotta try that!
.
.
.

lowjdml

Unfortunately, it's useless when it rains.

A4inPgh

The sudden slow down from traffic sign recognition is both annoying AND DANGEROUS as discussed above. I think the problem is two fold:

First, the car only responds as you PASS the sign and it take effect exactly there. It would be nice if the car would recognize the sign ahead of you and allow the vehicle to begin to coast down to the new lower limit. OR - give the driver a setting to make speed adjustments "quickly" or "gradually". (Yes - I'd even click through a "wavier screen" that the gradual slowdown may mean I am technically speeding as I pass the sign. )

Second - the car has GPS and memory. Why can't it REMEMBER where it saw that sign and the next time on the same road begin to slow down gradually before it gets to that spot?

Ideally traffic sign data could be shipped up "to the cloud" and all audi vehicles (that subscribe) could access the data... Kind of like how Waze sends speed info and traffic info...