See http://www.benzworld.org/forums/w163-m-class/1166641-ets-bas-warning-light-fix.html
The brake light switch is on a bracket just above the brake pedal.
how to replace the brake light switch at the pedal of a 2001 ford zx2
The brake light switch is located under the dash. It is connected to the upper arm on the Brake pedal
it goes under the brake pedal, it should twist out , it has two tabs on it , only about a half turn
You might have a bad brake light switch. If you don't have brake lights the switch is bad. When your brake light switch isn't working it wont send a signal to the shift solenoid.
Brake light, on your 2000 Chrysler Concorde, by accessing it from the inside of the trunk. Take hold of the brake light, push in and turn. The brake light will come out.
Check on the upper end of the brake pedal towards the dash
at the top behind brake pedal, don't remove the lower switch it for the cruise control
The light should be controlled by a switch operated by the emergency brake handle. The switch could be out of adjustment or could be bad.
The brake light switch is bad. It's under the dash, and is switched by the movement of the brake pedal.
The backup light switch and the brake switch are all in the same relay switch. The backup light switch can be found beneath the drivers side dashboard.
Should be at the upper end of the brake pedal under dash area