VW Auto hold - advice on freak incident
Discussion
fourstardan said:
Going to have to replicate this i think on the exact spot to work out if this was me.
Also this wasn't about hill hold but the Electronic Parking Brake. Is EPB automatic or does it always need to be turned on manually? My brain is scrambled eggs on this.
When reading this it sounds like a lot of people have experienced what I did yesterday and maybe the EPB has failed.
https://www.whatdotheyknow.com/request/vw_passat_e...
When I read your OP I knew you were referring to the EPB. Wife's Golf does the same - won't come on when it should, intermittently - and is subject to recall. Going in mid January to be sorted.Also this wasn't about hill hold but the Electronic Parking Brake. Is EPB automatic or does it always need to be turned on manually? My brain is scrambled eggs on this.
When reading this it sounds like a lot of people have experienced what I did yesterday and maybe the EPB has failed.
https://www.whatdotheyknow.com/request/vw_passat_e...
Edited by fourstardan on Sunday 24th December 20:49
iphonedyou said:
When I read your OP I knew you were referring to the EPB. Wife's Golf does the same - won't come on when it should, intermittently - and is subject to recall. Going in mid January to be sorted.
Reasonable post at last 
The thread title should say Auto Park Brake and save any confusion with the Auto hold
and with a hand brake that no longer exists
It should also be more reliable and less likely go wrong or be misused than a hand brake otherwise it's not really progress
The Wookie said:
EPB systems measure the clamp force by the amount of current driving motor and set it to a particular level when the brake is engaged.
Some systems will actually reset or apply more force a set period after the car has been parked to account for the cooling disc. Some also apply more force if the car detects it is parked on a steep gradient.
That may be so but you are still reliant on a single solution to stop the car moving. Age and use will affect the motor and sensors accuracy. Higher currents are not solely created by motor clamping force.Some systems will actually reset or apply more force a set period after the car has been parked to account for the cooling disc. Some also apply more force if the car detects it is parked on a steep gradient.
saaby93 said:
Reasonable post at last
The thread title should say Auto Park Brake and save any confusion with the Auto hold
and with a hand brake that no longer exists
It should also be more reliable and less likely go wrong or be misused than a hand brake otherwise it's not really progress
That makes a lot of sense. If the new automised versions of something are less efficient that the older manual system it's a backwards step. At least, with the old manual handbrake, you pretty much knew it was your own fault if not applied/applied incorrectly.The thread title should say Auto Park Brake and save any confusion with the Auto hold
and with a hand brake that no longer exists
It should also be more reliable and less likely go wrong or be misused than a hand brake otherwise it's not really progress
saaby93 said:
iphonedyou said:
When I read your OP I knew you were referring to the EPB. Wife's Golf does the same - won't come on when it should, intermittently - and is subject to recall. Going in mid January to be sorted.
Reasonable post at last The thread title should say Auto Park Brake and save any confusion with the Auto hold
and with a hand brake that no longer exists
It should also be more reliable and less likely go wrong or be misused than a hand brake otherwise it's not really progress
Irrespective, there wouldn't be a problem if people possessed the miniscule amount of common sense required to leave cars in gear or park.
SMB said:
That may be so but you are still reliant on a single solution to stop the car moving. Age and use will affect the motor and sensors accuracy. Higher currents are not solely created by motor clamping force.
Plenty of ways to get a false positive on a manual handbrake too such as a seized cable or caliper. My girlfriends mum ended up pinned against the wall of her late fathers house when the mechanism failed on one caliper between MOTs so only one was holding the car in place. Thankfully it was a shallow slope and someone saw it happen.I personally don’t think manual handbrakes are superior or safer, they’re just simpler.
The Wookie said:
SMB said:
That may be so but you are still reliant on a single solution to stop the car moving. Age and use will affect the motor and sensors accuracy. Higher currents are not solely created by motor clamping force.
Plenty of ways to get a false positive on a manual handbrake too such as a seized cable or caliper. My girlfriends mum ended up pinned against the wall of her late fathers house when the mechanism failed on one caliper between MOTs so only one was holding the car in place. Thankfully it was a shallow slope and someone saw it happen.I personally don’t think manual handbrakes are superior or safer, they’re just simpler.
Hi I have a Passat, manual transmission, Auto hold is always left on, when I start up, handbrake is lit, if my door is not shut properly or my seatbelt is not on I cant move anywhere as the handbtake wont release, in normal conditions, door shut, seatbelt on, the hand brake auto releases as I set off, auto hold works as it should at all times exept if you creep to a stop in traffic or under very light braking to a stop, it cant hold the pressure in the system if its not there to start with, I never use the handbrake switch, it come on when I am stopped and the seatbelt is taken off or I stop the engine, odd how it could roll away, unless yours is an early model and it has a differant working procedure, I have a 2012 Passat estate. Maybe your car is an earlier model that has a differant auto hold and parking system.
SMB said:
I think all you've done is prove my original point that you don't rely on the handbrake and should put the car in gear or park. The epb is really about driver convinience not extra safety. A simpler handbrake will always be more reliable statistically but neither solution is appropriate as the only solution to stop a car from moving.
If you say sozarjaz1991 said:
Muddle238 said:
What happened here was you got out of a car on a slope, without applying the handbrake, it's not surprising it ended up in a fence. Just lucky it didn't mow down a child!
The obligatory "think of the children" post.Once again I am obliged to ask....would it not have mattered if it had hit an adult? Is it ok to kill or injure them? Why do only children matter?
Wills2 said:
Never mind that, what if the child had been holding a kitten!
and that kitten had a cute pink nose and large trusting eyes.....Still, it seems a simple mechanical brake is far less likely to release itself and can be applied and released as required by the operator. I use Park, car in gear, and ensure wheels angled correctly when parking on slopes but note few of my younger aquaintances do. No longer taught by their peers during learning to drive perhaps? Hope the OP gets to the bottom of this.
Some may had seen my previous post on hill hold failure....my fault on that as this was clearly not going to be me using hill hold for a handbrake function.
The incident was on Christmas Saturday, and what happened that i'm still scratching my head on.
Parked car on a spot i've parked on before, got something out of the boot, locked up and left the car.
Came back to the car to find it rolled back and into a residents fence with the bumper needing to now be replaced.
I'm very concerned about this, has anyone had this really serious issue happen before? I've been searching a lot of forums and found a rather large amount of reports of this happening.
Where would I stand in terms of liability here? Could the EPB had failed?
The incident was on Christmas Saturday, and what happened that i'm still scratching my head on.
Parked car on a spot i've parked on before, got something out of the boot, locked up and left the car.
Came back to the car to find it rolled back and into a residents fence with the bumper needing to now be replaced.
I'm very concerned about this, has anyone had this really serious issue happen before? I've been searching a lot of forums and found a rather large amount of reports of this happening.
Where would I stand in terms of liability here? Could the EPB had failed?
Did you apply the epb and confirm the light was on before leaving the car? Or did you hope/expect it did it automatically.
For what its worth, I would never leave the car alone unless it was in gear, engine off.
Not a big fan of these daft things, sort of solving a problem that doesn't exist. Nothing wrong with a manual handle!
For what its worth, I would never leave the car alone unless it was in gear, engine off.
Not a big fan of these daft things, sort of solving a problem that doesn't exist. Nothing wrong with a manual handle!
I've parked my car, applied the parking brake and accidentally lifted the clutch with the car in gear before switching the engine off. That's disengaged the parking brake. I haven't let the car roll away but it's caught me out a couple of times and I have to think about what I'm doing now. I make sure the parking brake light is lit as I switch the engine off. Park the car, release the clutch pedal and switch the engine off in a hurry while not paying attention and you could let your car roll away.
Weird
I have a 2017 golf with an electronic hand brake and auto hold. It auto holds every time and automatically applies the parking brake when you take the keys out. Absolutely NO user intervention required at ANY point in the process.
It is possible that if you have been plying with the handbrake buttons you might have actually disengaged the hand brake by mistake rather than applying it as new VAGs appear to do it automatically, regardless.
The above comments are mainly directed at those who have questioned you applying the hand brake. In my experience, you don't need to!
As for what to do going forward - leave it in gear!
I have a 2017 golf with an electronic hand brake and auto hold. It auto holds every time and automatically applies the parking brake when you take the keys out. Absolutely NO user intervention required at ANY point in the process.
It is possible that if you have been plying with the handbrake buttons you might have actually disengaged the hand brake by mistake rather than applying it as new VAGs appear to do it automatically, regardless.
The above comments are mainly directed at those who have questioned you applying the hand brake. In my experience, you don't need to!
As for what to do going forward - leave it in gear!
Gassing Station | General Gassing | Top of Page | What's New | My Stuff