SaffsDad

For those of you who have Traffic Jam Assist, do any of you notice a clicking noise coming from the driver's side footwell when the function is engaged?

It appears that whenever the system engages/disengages the rear brake lights, a relay goes off. The clicking noise really becomes bothersome which is ironic since Traffic Jam Assist is supposed to help ease stress during traffic, but this clicking noise just drives my stress back up again.

I'm going to be taking my 3-week old car into service this Friday, but wondered if there is any TSB or comment that has previously been made on this subject (other than the ABS clicks). Thanks!

ChrisGlenAllen

I use it daily and haven't noticed any noises. There is a clicking sound at some point around 20-25 mph. Although I have only notice that when starting to drive it to work or home, not on the highway w/ TJA even after sitting still for a bit (or stop lights for that matter).

Mike60564

I haven't noticed it either. Maybe my music is too loud?

SaffsDad

Thanks for the feedback I'm going to be at the dealer tomorrow. Hopefully I'll find out more and share it with the forum.

Apollo4

I have this same feedback at approximately 24mph. Apparently that noise is the ABS system kicking up for the first time.

Related thread: https://www.audiworld.com/forums/q7-...noise-2905457/

SaffsDad

The service dept is going to keep my car over the weekend. I hope they figure out where the noise is coming from and fix it.

wdimagineer

It's normal and is a side effect of the system actively regulating/controlling brake pressure while the vehicle is being autonomously piloted. Some of that pressure makes it way back to the brake pedal, resulting in a small noise.

SaffsDad

So, they've had the car over the weekend (it sat there parked for 3 days untouched per Audi MMI Connect) so they finally got around to trying to diagnose the issue today. Of course they can't replicate it, so I'm going to go into the dealership tomorrow to drive with one of the techs. More to come...

wdimagineer

It's normal.

adg44

As stated, this is normal for all vehicles with adaptive cruise control. Go get your car back from the dealer and enjoy it.