In the last few weeks I have developed what is, for now, an annoyance but not much more. At times, I will get in the car, start it up, and put the car in drive but on these occasions, the parking brake remains engaged, requiring that I turn it off manually. I am taking the car in next month for some warranty work and will mention this to them but, as it is only intermittent, I am expecting them to tell me that they were unable to replicate the problem.

Wondering if anyone else has experienced this.

2015 V6S Coupe

 

With the MT, I always have to disengage it manually. If I forget, it will disengage automatically if enough clutch is released, but that results in a "jerky" launch and can't be very good for the driveline.

 

On my 2015 the EPB only disengages when the car starts to move. If parked on level ground then just putting into a driving gear is enough to disengage it the moment I lift my foot off the foot brake as the car creeps on its own, but if parked on an incline sloping away from the driving direction the EPB stays engaged until the accelerator is depressed slightly. That is by design to stop the car moving if you stop on a hill because you can't feather the handbrake off to match the gas like you would with a lever. My drive triggers that and the fall is only about 1" across 3'. I don't know how it detects that scenario though. If I did a silly launch I would probably feel it release with a jerk (and end up in my neighbour's kitchen!) but normally I don't feel it, only hear it disengaging.

Have you changed where you are parking your car? On an occasion when the EPB does not disengage, can you release smoothly it with the accelerator pedal? If it does it on level ground then maybe whatever method they use to detect the hill hold is not working correctly. Your dealer can input those symptoms into their diagnostics system to get some suggestions.

 

On an AT, the hill hold headed uphill has nothing to do with the parking brake. That has to do with the internal hydraulic logic in the AT. That's been the case on almost every single AT since they were first introduced on cars. On the F-Type, I assumed the AT worked similarly to the MT in that it will automatically release the PB only in the event that it detects drivetrain induced pressure on the PB indicating that you forgot to release the PB.

 

Note that the seatbelt has to latched, and the driver's door closed, for 'Driveaway Release' to work.
https://www.dropbox.com/s/uajlxghl1a...brake.pdf?dl=0

 

The times that I recall this occurring, the car has been located in the garage. It may have happened elsewhere as well but I can't recall that with certainty. The garage floor is concrete and is level, so I don't think that's the explanation. Although I typically latch my seatbelt prior to placing my foot on the accelerator, every once in a while it does not occur in that order. Perhaps this issue is related to the seatbelt. Interesting notion. I'll be looking to see if this is the cause.

 

Not sure if you have MT or AT.

On my AT as others have stated if in drive with epb on it will only automatically disengage epb when you press accelerator, however if you have P selected and epb engaged then it will disengage epb when drive is selected.