2002 Mercedes Benz CLK320 ESP BAS and ABS lights come on

Brakes problem
2002 Mercedes Benz CLK320 4 cyl Four Wheel Drive 70000 miles

last week the esp bas ans abs warning indicators started coming on after about 2 miles after ignition, no idea why, I did hit a pothole and wonder if that could have caudsed it, also I got the key wet and disabled the remote entry. Is there a cheaper fix than buying from dealer