MG 5 - Car "dies" in traffic queue with manual parking brake applied

[kevin ellard]

This is because the car controller will disengage the HV battery, if the car is left for long periods parked with the car switched on (ready to drive) this is for safety, and also to save discharging the battery if the car has accidentally been left switched on.

I fairly sure mine doesn't do that . Last winter I was stuck for 2.5 hours on a motorway in the snow and the car stayed on with the HV battery happily powering the heater.

 

[Amun]

Why do u use the parking brake is it not easier to just put your foot on the brake when waiting

And if it's a long wait, put it into park... I never touch the brake button.

 

[PVperson]

Well, yes. Tell the chinese designers, that's what the car does.

I fairly sure mine doesn't do that . Last winter I was stuck for 2.5 hours on a motorway in the snow and the car stayed on with the HV battery happily powering the heater.

Yes, I think if you've got the heater running, it won't disconnect. Not necessarily a good thing, I once left my heater on 25deg to warm up on a cold day, and when I came out later, the car was boiling and the battery was on 75%!!!

 

[MickeySw]

Yes, I think if you've got the heater running, it won't disconnect. Not necessarily a good thing, I once left my heater on 25deg to warm up on a cold day, and when I came out later, the car was boiling and the battery was on 75%!!!

Well, if it just tuned off the HV in your example, the 12V aux would have been empty by the time you came out and you’d be going nowhere without jump leads…

 

[CarlThom]

Not wanting to blind the guy behind me.

If you have regen 3 engaged the brake lights come on anyway when its active

I'm not sure if it will do it when just on the parking brake for long enough, but I've had a case where my car was stopped a while in a traffic jam on cruise control and it eventually auto applied the parking brake and took itself out of drive.

You can definitely sit with it in Drive and on the parking brake for a fair while though as I sometimes do especially if it's at night to avoid shining the brake lights into the face of the person behind.

It would be interesting if to see if yours has taken itself out of the ready state entirely or if it's just gone into neutral/park

I seem to recall that using the manual parking brake puts the car in neutral and you have to push footbrake and engage drive to move off safety feature

 

[Gomev]

I seem to recall that using the manual parking brake puts the car in neutral and you have to push footbrake and engage drive to move off safety feature

Nope, just press the accelerator to move away same as Autohold. You may be thinking about 'Park'.

 

[t509triumph]

The round control on the centre console effectively disconnects the motor when it's pressed.
Using the levers for auto hold or brake keep the motor connected maintaining drive mode.

 

[MickeySw]

The round control on the centre console effectively disconnects the motor when it's pressed.
Using the levers for auto hold or brake keep the motor connected maintaining drive mode.

The electric motor in EVs cannot be mechanically disconnected (hence the recommendation not to tow them)

When pushing the ‘P’ button on the gear selector, a mechanism is deployed that blocks the rotation of the intermediate shaft.

The auto hold function is using the rear wheel brakes.