In my 2014 i3-Rex (94,000 km) since a few weeks, every time I press the accelerator pedal (from standstill or from very low speed), I'm hearing a kind of metal to metal sound.
Like a "click". As if the drive unit moves a bit and somehow hitst a metal limit.
It is not very loud.
So wether it happens with Rex in operation, is not possible to be heared.
But I suppose that it has nothing to do with it. Because, also in that case, actually the electric drivetrain of the wheels is being used to drive the wheels.
Has anyone ever had something like this? Or any idea of what it might be?