WLJ

Hello, brand new here and have a problem I cant seem to find the exact answer to. I have a 2010 c250 4matic and it keeps giving a code for a bad stoplight switch.Replaced it twice and still the same code.ABS light is not on but tire pressure and ESP warnings are on.Its almost as the new switches are defective.I put the old one in and all warnings go off but brake lights never shut off.Cruise control will not work either but will work when old switch is in but like I said brake lights are on all the time.
Any suggestions would be appreciated, and I'm happy to be here
WLJ