Collision Warning System Controller Unit, Detailed Information - GF30.30-P-9893-01A

Model 118, 177, 247 

Fig 1: Active Brake Assist/Collision Warning System Controller Unit Components Location - Model 177

Courtesy of MERCEDES-BENZ USA

Location 

The Active Brake Assist controller unit is located on the right-hand side when viewed in the direction of travel behind a cover in the front bumper.