Yellow warning light on dash

[Victorfox]

Hi
2017 s class 350d
Had the top left yellow brake warning light (O) come on . Goes out after restart but back on within a short period . Had the codes read and says refer to OEM for codes ?
Checked fluid and visual on brake pads , all seems ok .
Car has only done 7000 miles !
Any ideas before I go to Mercedes
Not bought from main dealer .

 

[mioba]

Welcome to the forum.

It must still be under warranty. Dealer.

In the meantime get a good indy with star or something just as good.

Stick around on the forum and do post the results