MBGLA45

I am not sure who on this planet to help me with this issue, But here it goes. I am an advanced high-performance driver and I attend 13 to 18 track events per year. If AMG built this GTS to directly compete against the Porsche 911 why is it I can not turn off the irritating auto braking and seatbelt pre-tensioning. This occurs even when I select this forward collision program to be "off" AND the car is in race mode and I am shifting manually. My lap times are constantly being reduced by this feature. It is also placing me in danger by taking away control entering corners following closely with other drivers. When this occurs I have had cars behind me almost run into me from behind. Is the only answer to purchase an overpriced Porsche GT3 or go back to my crappy Corvette ZR1? And Yes I know you have to disable the forward collision in the assist menu everytime you start the car.

MalibuScott

Might this be of help? (From the manual for the GT coupe. Available for some reason only on the Canadian website. The manual on the U.S. website, supposedly for the coupe, is for the cabriolet.)

susman@eurogermantown.com

forward collision should be OFF if you turned off in the menu... should not auto brake

thebishman

thebishman

AMG 17GT

thebishman

Ricky-Bobby

Hey, I am experiencing the same thing with my '16 AMG GTs, which I just tracked for the first few times earlier this year. It's frustrating and incredibly dangerous. Turning off collision avoidance stops the auto braking...which scared the h3ll out of me and nearly caused me to get punted from behind by a Mclaren. Initially I foolishly assumed that putting the car in "Race Mode" automatically de-activated collision avoidance. Wrong. I was told by someone that there's a fuse in the trunk compartment that you can remove that stops the seat belt problem...but not sure if that also stops the seatbelt from tensioning if you crash? I am reaching out to MBUSA today to see if they have answer...will post an update if I get anything helpful back.

AMG 17GT

The last thing MBUSA will do is show you how to deactivate their own safety system.

Don’t waste your time and tape over the sensors.

Ricky-Bobby

The seat belt tensioning happens even when no other cars or objects are close. So taping over sensors doesn't help...at least not that I have found. All you have to do is slightly break traction (nearly every turn on a track), or brake super hard (nearly end of every straight), and the seat belts lock up. Tightening the seat belts makes sense the problem is they don't release for several seconds or even minutes. Never had this problem with any other Make on a track.

502Bill

“TC off” will disable ABA as stated here. All models of AMG GT. This is the only way I know with certainty.

MalibuScott

On my iPhone app I go to Vehicle Settings and then Belt Adjustment and can turn off the "adjustment." Might that be a solution to one of the problems?

4wheelz

Might be a little old school, but I’m betting those sensors behind the front bumper are probably in series with each other to a main wire harness - would it not be simple to splice in a contact/no contact switch to the harness and mount it somewhere under the hood so on race day you can flip the switch to “off” and it just severs communication with the sensors? Then when done on the track, flip it back to “on”. Essentially a simple way to “unplug” them when needed.

Case1906

Learned counsel agrees with learned counsel.

Case1906

Try layers of metallic tape over the sensors including Distronic.

Theweezersdad

Interesting. I always thought that taping the sensors would activated them continuously, AND, I thought the ABA was controlled via the camera in the windshield by the rear view mirror.

What does that camera/radar in the windshield do?

Thanks for the education!

Ricky-Bobby

With the multiple layers of metallic tape over the sensors you don't get the seat belt lock up at all, even when you break traction a bit? I will definitely try that next time out!! Thanks.

Ricky-Bobby

I'm going to try that as well as metallic tape over the sensors. Thanks.

Case1906

Correct, it has worked for me. Give it a try.

Case1906

The windshield sensor is for the lane keeping function.

Theweezersdad

Ah...thanks!

JSwan724

FWIW: MB seems to know about this issue since it’s NOT an option on thr GTBS ordering guide aka DOG.
They also dialed down Lane Tracking as well.. not as abrupt I am told.

We’ll see…. soon.

Has anybody floated the issue on the MB AMG site to see if they have some idwas?

Jerry

shsmith2172

I also have a 2016 AMG GTS and this problem has driven me nuts. Renntech now has a OBDII module that you can use to completely turn off all the Pre-Safe functions. Unfortunately, this only works on cars that have automatic braking. I intentionally bought a car without automatic braking just for track purposes, but this software fix won't turn off the seat belt tensioners without the automatic braking module installed. The engineers at Renntech took the time to try and come up with another software solution, but no dice. Hopefully, this will help some of you guys.

bhamcarnut

I have a 2016 without Distronic and had issues at the track last time I was there. Last weekend I replaced my grill and had the bumper off, so I placed an inline switch for the ground wire that goes to the radar for Collision avoidance. When I turn the switch off is shows it being as inactive.

My next track day at Barber Motorsports is on the 31st and I will be able to see if this works or if it causes other issues. Hoping for the best!!!

4wheelz

i had the same idea - please let us know how this works out and if it works well, please let us know what ground wire you used for the switch. Maybe a few pics 🙂