My Panemera has this bad hold stop feature to prevent my car from rolling backwards. We dislike the feature and it makes pulling into the garage annoying.
Do the new Cayennes have it too?

 

yes, it does. Although driving around the hills of San Francisco, I really like this feature

 

My 08 doesn't have a hold stop, and it also doesn't roll backwards either. Can anyone tell me why it could be possible to roll backwards to where it needs a hold stop feature?
When slowly pulling into a garage up the driveway I can't really go fast or it would be quite unsafe. So when the hold stop activates it is like briefly hitting an emergency brake and to deactivate the hold stop I need to hit the gas hard enough which is also unsafe with about 5-10 feet left to go before hitting a wall.

 

Come to think of it I haven't seen this in my wife's '12 RX450, '08 ML350, '07 IS250, '04 RX350, '99 RX300, my: '08 Cayenne, '04 4runner, '98 CRV or '87 Lebaron. Come to think of it rolling back only applied to my '92 Corolla stick shift. So why does an automatic have the ability to roll backward in drive, and the ability to prevent it at the expense it's driving experience?

 

I haven't noticed it impacting driving performance. For me it only engages after I have come to a complete stop on a fairly steep hill. In San Francisco, the hills are very, very steep and even an automatic transmission can experience backward rolling. The hill hold prevents that and allows you to accelerate more slowly. Without it you can need to gun the engine which isn't great in crowded traffic.

If yours is engaging before you come to a complete stop then perhaps there is an issue with it?

 

It happens at the complete stop, and lightly touching the gas doesn't over-ride it. I don't apply too much gas foot petal pressure pulling up my driveway which is in Louisiana.
Imagine letting of the gas an coasting up the driveway to the open garage door, and as the car stops from lack of inertia I tap the gas a little more to pull in. On my 08 I just pull in fine, on my wife's Panemera it doesn't. I can't touch the gas to accelerate, it pauses.25-.5 seconds so that the light comes on and tapping the gas doesn't engage as it if the car stalled or is locked in place. Wait a second and the gas will respond but to aggressive for pulling up several feet to park. It doesn't always happen but it really frustrates her and I when it does.

 

I havent noticed the same experience with the Cayenne. It doesnt engage that quickly or get in the way. Not sure if that is a Cayenne v Panamera thing or there is an issue with your wife's car

 

The MY08 Cayennes do have auto-hold. I use mine all the time.

 

hold stop is different than hill assist.

hold stop works well, doesn't intrude on normal driving experiences.

 

Opps... got my Porsche terminology mixed up - edited. Looks like the official term is "auto hold":

http://www.porsche.com/microsite/tec...lectedVariant=

 

also called hill holder or hillholder

 

I noticed the same on my 2012 Cayenne S (958) and it bothers/hinders me on a daily basis to the point that I would call it a design/engineering flaw. My previous car, a 2009 Cayenne (957) didn’t have the pretentious HOLD option but on any steep hill here in LA it would just smoothly prevent itself from rolling back, and gently or firmly pressing the accelerator pedal would result in the car smoothly and effortlessly moving forward as if it were standing still on a straight surface. Mind you this was an older model In a similar situation in my 958 the word HOLD lights up when the feature’s active, which seems to use the car’s brakes instead of a transmission lock(?) -at least it feels that way- and overriding it means I have to press the accelerator pedal more than gently. When pressing the accelerator very gently nothing happens, so I have to press slightly deeper for the HOLD to release which is anything but smooth and makes the car move/jump forward a foot or so. I often parallel park in my street which is at a slight incline and every time the HOLD option locks up, I have to press the accelerator pedal gently while having my left foot on the brake pedal ready in case the car moves forward too fast. Perhaps it needs calibration? The issue isn’t bad on real steep inclines but extremely useless and annoying on slight inclines. If only there was the option to turn it off…

(btw, my aunt has a 2017 958 Platinum with <15000 miles and hers responds the same way so I’m thinking it’s the feature itself that’s bad)

 

My '17 GTS doesn't unexpected activate brake hold. The only times it activates are if I'm in ACC mode and it has had to stop due to traffic, or if I put a LOT of pressure on the brake while stopped. With ACC it releases with a press of the stalk (to resume ACC), with pedal HOLD it does sometimes seem to take more accelerator than you might expect. We've got a number of hills around here that'd exceed the 5% incline, including a couple of parking garages with crazy-steep ramps. Brake hold has not been a problem on them.

I've never had it activate unexpectedly though, at least not during normal driving.

I have had it activate when I had to get out of the vehicle quickly to deal with something. I'd left it in drive and the HOLD function kicked in automatically when I opened the door and got out. It went the extra step of activating the emergency brake, which was sort of the only reason I realized the car had stepped in to second-guess my actions.

The manual does not indicate a way to disable the feature. I wonder if there's a PIWIS code for managing/adjusting it?

 

I'm no expert on the transmissions used here, but afaik there's no "lock" in any sort of automatic transmission. At least not besides changing out of a drive gear into Park. The 'standstill' than happens is due to the torque converter stall, where the RPMs coming out of the engine are turning it 'just enough' to no cause motion. A automatic transmission works by flinging transmission fluid (oil) around inside the torque converter. At a certain point there's enough rotational force from the RPMs to cause the fluid to push hard enough for the system to engage. It's that in-between point of enough RPMs to keep just enough pressure through the torque converter to make you feel like it's 'locked'.

 

Makes sense, although i'm pretty sure the way the 957 Cayenne prevents itself from rolling back on a hill is by blocking something in the drivetrain which prevents it from rolling back. Applying the brakes comes with a certain noise/friction which is noticeable and this is entirely missing. With the 958 it does feel like the brakes are applied, thus the brakes and the transmission seem to not work in perfect alignment.

Also, in my R129, and W126 Mercedes I had the same feature as in the 957, and Mercedes called it a topographic sensor which does something in the transmission to prevent it from rolling backwards, and even these cars did a better job than the 958 imho...