The ESP and BAS warning lights may illuminate due to a failed brake light switch. Replacement of the failed switch should correct this concern.Google+
Car Problem Reports
Mercedes-Benz E320 Brake Light Switch Failure May Cause ESP/BAS Warning Lights
Mercedes-Benz E320 Problem
Average Mileage: 125,053 mi (15,000 mi - 340,000 mi)
Visitor, 2000 Mercedes-Benz E320, 81,000 mi
Mercedes-Benz E320 : Brake Light Switch Failure May Cause ESP/BAS Warning Lights
Visitor, 2000 Mercedes-Benz E320, 144,252 mi
ESP / BAS / ABS warning lights come on. Brake lights work intermittently.
Shop replace brake light switch and relay. Checked all bulbs / connections. Fixed the problem for 10 miles, then the same issue came back.
Returned to shop. They had the car for 2 days. No warning lights came on and the brake lights worked fine. 10 miles from the shop, the warning lights came on again and brake lights didn't work.
I replaced the brake light switch as second time, but that did not make any difference. Problem still comes and goes.
Going back to shop again.
warning scared the crap out of me. 14 dollar part.
Visitor, 2000 Mercedes-Benz E320, 117,000 mi
Brake light indicator. replaced switch worked ok for a few days.. i have noticed that after warming up the car, then letting it cool and problem disappears for the rest of that day them, next am, whammo! same problem this feels like groundhog day! ESP and BAS light warnings accompany this odd phenom! Makes me want to brn the car!!
Visitor, 2000 Mercedes-Benz E320, 110,115 mi
Turn on ignition, step on break and get lamp defective, BAS, ESP, ABS malfunction messages.
Visitor, 2002 Mercedes-Benz E320, 95,000 mi
Every year or so ,without fail I need to replace to brake light switch. The Bas/Esp light goes on and will want to lock out the transmission shifter. I have owned my car for 7 years and have replaced the switch 6 times. It is not a difficult DIY repair and takes about 20 minutes to complete. The switch is $25 and the dealer will charge you about $150 for labor to install it.
Visitor, 1997 Mercedes-Benz E320, 157,000 mi
Warning: Check Lamps. Fix: Replace bulb.
Visitor, 2001 Mercedes-Benz E320, 103,000 mi
not fixed working on it
Visitor, 2001 Mercedes-Benz E320, 23,000 mi
failed 6 times also new style faided 2 x
Visitor, 2001 Mercedes-Benz E320
brake lights are now on all the time