Mercedes-Benz GLA250 Radio Code

Radio installation

also one more thing my radio makes no sound lites up I changed out radio and amp still no sound please help also I'm not get any power to my red white wire on my fuel pump someone has ran a jump wire from the 5 fuses under hood I was told it was the number 3 fuse but no I found diagram and it shows the wire going to a 7 fuse block and where would that be located at without jump wire my car won't run would like it fixed right