Mercedes Bclass W246 engine management light

[Paul2415]

I have a 2013 Mercedes B class , had it for around 3 months, keep getting the error codes below but only when it rains it seems, I can drive 500 plus miles in the dry with no errors, go out on a damp or wet road and on comes the engine management light, re set them and they go away even if wet road again?, has no effect on engine or performance, was wondering if there is a common area they they plug into etc ?

P20802A temperature sensor 1, exhaust system bank 1, there is no signal change

P04262A temperature sensor 1 catalytic converter cylinder bank 1 , no signal change

P010106 mass air flow sensor , there is an algorithm fault

Any ideas would be greatly appreciated, thanks