Remove/Install Active Brake Assist Electric Controller Unit - AR54.21-P-0700MFB
Model 177
with code 258 (Collision warning system with active brake application FCW-Stop)
with code 772 (AMG styling - Front spoiler, side skirts)
Model 243
with code 258 (Collision warning system with active brake application FCW-Stop)
Fig 1: Active Brake Assist Electric Controller Unit Components Location - Model 177 With Code 258 With Code 772
| Notice | Notes on preventing damage to electronic components due to a magnetic tool | AH54.00-P-0002-01A | |
| Notice | Information on preventing damage to electronic components due to electrostatic discharge | AH54.00-P-0001-01A | |
| Remove/install | |||
| 1 | Remove Mercedes star. | Model 177 with code 258 (Collision warning system with active brake application FCW-Stop) with code 772 (AMG styling - Front spoiler, side skirts) |
AR88.40-P-4053MFA |
| Model 243 with code 258 (Collision warning system with active brake application FCW-Stop) |
AR88.40-P-4053EQA | ||
| 2 | Unclip Active Brake Assist controller unit (A108) and release and disconnect electrical connector (1). | ||
| 3 | Install in the reverse order. | ||
| 4.1 | Commission Active Brake Assist controller unit (A108). | If the Active Brake Assist controller unit (A108 has been replaced. | |
| AD00.00-P-2000-06MFA | |||
| 4.2 | Perform calibration of Active Brake Assist controller unit (A108). | If Active Brake Assist controller unit (A108) is reused. | |
| AD00.00-P-2000-06MFA |