Audi A5 2.0 TFSI Quattro auto (2014) - Wheels locked up...
Discussion
Need some help. Driving along at just over 50mph. Bong sound, red chevrons flashed on dash, "Distance" warning on dash, wheels locked up momentarily then everything resumed as normal. All happened in a second. Thought I'd hit something but hadn't. Got an ear bashing from the wife for no reason. Heart rate just about recovered now. I'll ring the dealership tomorrow but not expecting much from them. Any ideas?
Edited by stevealmond63 on Monday 1st February 19:21
Thanks for the replies guys. I have the adaptive cruise control but it wasn't engaged / activated at the time. The braking experience was very much like the ABS....but just one single 'hit' with that 'crunch' sound and the dash warnings coming on briefly. I didn't skid. It was dark at the time but the road surface was dry. There was no vehicle in front or behind. Problem is that I'm now gong to worry about it unless I can get an understanding of what caused it!! Car has only done 4K miles. Cheers!
It sounds like the "Braking guard" feature. Not on my car, but have a read of this: http://www.fourtitude.com/news/publish/Audi_News/a...
fourtitude said:
If the vehicle in front brakes abruptly, however, a situation can arise in which this automatic braking function may no longer be enough. What is more, the driver may not perceive the new situation fast enough; analyses of Audi accident research show that 70 percent of all collisions are caused by drivers who are distracted, tired or not concentrating. This is where the ACC subsystem Audi braking guard comes into action, warning the driver in two separate stages.
Stage one consists of a warning gong and a red symbol that flashes up in the instrument cluster. The ESP stabilization system makes sure that the brake system is primed with hydraulic fluid. If the driver still fails to take action, this is followed by the second stage known as the "acute" warning. This stage is triggered when the warning algorithm comes to the conclusion that the situation can only be mitigated if the driver reacts immediately – usually by executing an emergency braking.
The form of the acute warning was a key issue during development of the system. During an extensive series of tests carried out with subjects from the University of the Federal Armed Forces in Munich, the engineers were able to test out various possibilities. The clear winner was the warning jolt, which is generated by a swift build-up of pressure in the braking system and lasts just 0.5 seconds. This slows down the vehicle by no more than 5 km/h to avoid any risk of being shunted by following traffic.
And... Stage one consists of a warning gong and a red symbol that flashes up in the instrument cluster. The ESP stabilization system makes sure that the brake system is primed with hydraulic fluid. If the driver still fails to take action, this is followed by the second stage known as the "acute" warning. This stage is triggered when the warning algorithm comes to the conclusion that the situation can only be mitigated if the driver reacts immediately – usually by executing an emergency braking.
The form of the acute warning was a key issue during development of the system. During an extensive series of tests carried out with subjects from the University of the Federal Armed Forces in Munich, the engineers were able to test out various possibilities. The clear winner was the warning jolt, which is generated by a swift build-up of pressure in the braking system and lasts just 0.5 seconds. This slows down the vehicle by no more than 5 km/h to avoid any risk of being shunted by following traffic.
fourtitude said:
Audi braking guard is also on the lookout when the ACC system is deactivated.
So, unless you've specificically disabled it, it's still watching out for you. If it triggered incorrectly I'd get it checked over by your dealer - but I think you can fully disable it if you want.That's great! Thanks for going to so much trouble to help!
Last month, on a country road at night, I got the gong and red warning light...then nothing. I ignored it. Now it's applying the brakes I'll get it checked out. Next time it may be a full hard brake and I'm not sure my nerves will cope!
There's a lesson for me also. I bought the car pre-spec'd by the dealer and didn't get a full explanation of what it had. On my return visit I'll get them to explain it to me properly so at least I'll know what to Google!!
Thanks again for your help.
Last month, on a country road at night, I got the gong and red warning light...then nothing. I ignored it. Now it's applying the brakes I'll get it checked out. Next time it may be a full hard brake and I'm not sure my nerves will cope!
There's a lesson for me also. I bought the car pre-spec'd by the dealer and didn't get a full explanation of what it had. On my return visit I'll get them to explain it to me properly so at least I'll know what to Google!!
Thanks again for your help.
stevealmond63 said:
Thanks Scuffers. Not used to all this tech. Was bad enough in first week when the steering wheel kept tugging at my hand. Thought I'd bought a lemon until I found it was some lane assist feature. Turned that off right away! Getting there I think!!
Bit off topic sorry....OP have you got links to Kent?Gassing Station | Audi, Seat, Skoda & VW | Top of Page | What's New | My Stuff