Electro-mechanical parking brake

[clio222]

starting to wish I had never purchased what was supposed to be my pride and joy, anyway he goes.

Audi A4(59 plate) with EPB parked in driveway which has slight incline, EPB switched on press clutch and select 1st gear or reverse gear depending on how vehicle is parked, depress accelerator lift clutch and hay presto EPB releases however not enough power to drive up slope and the car rolls back hairy stuff. Surley the vehicle should not release until it is at the biting point and hold allowing more throttle.

What I need to do to be on the safe side is extra throttle just in case not enough, wife now refusing to drive the car after a couple of near misses into the garage door.

is this a fault with the vehicle, can it be adjusted or is it just one of these things that the driver needs to master. Im dreading coming to a stop on a step slope just how much throttle is needed god knows it would appear an accident awaiting to happen, surley this can't be right

Anyone else came across this, should I contact the garage Thanks

[MFGF]

That sounds rather dangerous to me! The parking brake should auto release at the biting point of the clutch. The only time I have experienced an issue like yours is when I tried to pull away on a slope in neutral!

Cheers!

MF.


Snet form my fumblefingers
iPhon 5 usig Tapatalk

[thescouselander]

Yes, i know what you mean - the hand brake can be a bit tricky if the slope is steep enough, especially if you need to reverse up the slope. I suggest giving the engine a few more RPM and bring the clutch up a bit faster.

[J_B204]

Got to say I've never had that sort of problem, the brake has always released appropriately.

Sent from my LT15i using Tapatalk

[clio222]

Anybody else have this issue ????
This is what the manual states" When driving away on a gradient, the parking brake auto release function prevents the vehicle from rolling back unintentionally.The braking force of the parking brake is only released when there is enough power at the wheels to make the vehicke move in the desired direction". Unfortunately I have found this not to be the case as I have on sevreral ocassions rolled forward/back.

[ScottyUK]

I've always been impressed with pulling away on the gradients. No roll back at all. Sounds like summat's not right on the OP's car.

[a8 tech]

it would be advisable to spec hill hold assist for this driving style or adapt your driving to the basic function of epb


ScreenShot002 by [url=http://www.flickr.com/people/33525279@N04/]

if this doesn't answer your query then please try a similar vehicle in the same manor to compare if driver error

owners handbooks are not specific to the equipment fitted to each model and more of a guide than actual factual technical operation

if clutch slip is occurring then this will impact the epb operation, please state the gradient of the incline and rpm at the actual time via data logging with vcds also add abs log file and brake and clutch position mvbs

for a more accurate diagnosis if at all any is needed

for the mean time please take care as with most problems like this it becomes in bedded in the owners mind that there is a defect and only by like for like comparison will this be resolved

also try a vehicle with hill hold assist and you will see the benefits of the system over the standard system

ultimately safety or comfort features are there to asisit and you the driver are the over ride so you are in control when reversing up the gradient not the epb

[MFGF]

Mine works exactly as the manual describes.


Snet form my fumblefingers
iPhon 5 usig Tapatalk

[a8 tech]

It will function as intended as long as the operator controls the vehicle accordingly

Epb need speed input, seat belt engagement, clutch and brake switch status and inclination signal

As it operates in this case then fails it suggests driver error but without any live data its speculation and having dealt with similar customer complaints it tends to be the operator not the vehicle hence I mention test like for like before moving on to possible causes

I have myself put the suggestion of operator error forward and maybe this is incorrect however it must be considered

[ScottyUK]

I guess the fact that enough torque for forward movement only has to be there for a moment and then once it's disengaged it could quite easily roll back could easily suggest that.

I'd assummed that the posted would have ensured that wasn't the case but I have to agree it's the most likely.