E90 318d brake light and lift indicator

[Wheatley173]

Hi all,

I have a 2007 e90 318d m sport. Recently it has thrown up an intermittent problem where the red brake light and lift indicator will come on with no other warning or indication (no prior amber lights)

The strange thing about this is it only comes on from the following:

1) during a hot day
2) will come on after driving for a short while only after stopping the car and then returning to start the car.

Brake fluid is at a good level. Rear disc and pads have recently been changed. Fronts do look like they need replacing soon, but was waiting to get this done.
I don't believe the issue to be the wear sensor for the fronts, due to being intermittent. I would expect this to be on permanently is the sensor wears through. It can go 2 weeks at a time before coming on again.

Once on, if the car is left for some time it won't appear again.

I can only believe this must be heat related (during a hot day or once the car has been driven for a while and then stood still for a short while, to then be restarted....heat soak ?)

Any one had something similar?

Thank you.

Also if any is interested, I've recently purchased a f30 318d m sport, so having a good opportunity to compare like for like

Thanks