Originally Posted by GK12345EMAIL

It is my understanding that TJA tracks the vehicle in front of you (not just distance but direction).t.

Originally Posted by markcincinnati

Traffic Jam Assist comes on at speeds south of 40MPH -- to make this happen, you need to have ACC and Lane Keeping "ON" -- you just push the button on the end of turn signal stalk and TJA is turned on. When you are in heavy traffic and you have both systems on AND are at speeds up to 39MPH the TJA comes on -- you can feel when it happens, of course, but there is a visual indication that you are in TJA mode -- you see the little green car in the dash (or on the HUD or both) and you also see several cars stacked up (also in green), then you take your foot off the pedals and hands off the wheel and the damn thing just takes over for you. When Level 3 is made US legal I believe the Q8 has all of the needed "stuff" to make this TJA not shut off after 15 seconds, it will stay on indefinitely until conditions permit speeds OVER 39MPH. It is very handy even at level 2, but you have to touch the wheel a bit to keep it alive (it keeps asking you to take over if you try to go hands-free longer than 15 seconds.)

I was told the Q8, A8, A7, and A6 are hobbled (in the US) but that it's just software that needs to be turned on or downloaded once our laws catch up with the Germans.

Originally Posted by cbl1

I noticed my Q8 seems to ping pong a good bit from side to side with lane assist on.

Had a loaner Q7 the other day that tended to keep its self centered in lane (you could see the steering wheel quickly moving back and forth - vs Q8 never see it turn one direction and quick back other to keep itself straight).

Is there an adjustment in MMI to make it center itself more.

Originally Posted by SYMAWD

Lane keep assist (icon on lower display screen) will ping pong. If you set ACC and have adaptive cruise assist with lane guidance on (end of turn signal stalk), it will more or less stay center.

Originally Posted by jrjunior31