[Noggie]

My car was set up the same.

I have a 11KW home charger and the high quality BMW cable, so I set my Mode 2 and 3 charging to high.

I guess the reduced is a default setting from BMW in case you use an off-brand cheap cable or something.

The Mode 2 is probably set to reduced by default as most probably don't have a dedicated socket outlet for charging.

Should be no problem to change Mode 3 to high if you have a home charger.

For Mode 2 it would depend on the socket you connect to, In my country I would have it at high if I had a 16A circuit with nothing else connected, but leave it at reduced if that was a shared circuit or a 10A circuit.