CL 55 AMG W215 brake light constantly on even during driving, helpeeeeeee

Hello everyone, I’ve registered here and already a problem I drive a CL 55 AMG BJ 11/01 I’m actually very happy with my car but I have a problem My brake light is constantly shining, even during the ride. I’ve already changed the brake light switch, so that’s not it. If I take out a small 5 he secure at the front it works quite normal again but then my power steering becomes a bit more difficult. Please for your help. Thank you in advance…