Vehicle scope
The source body identifies 2019–2021 Mercedes-Benz C-Class 205 and GLC253 vehicles and describes replacing the front radar and modifying its wiring. The illustrated procedure is labeled 2019–2020 C-Class/GLC. Confirm the exact vehicle, radar and harness versions before using the pictured connections.
The source also lists 2019–2023 A-Class 177, CLA118, B-Class 247, GLA247 and GLB247 as references for replacing the ACC switch. This does not establish that every listed vehicle can gain ACC by replacing the switch alone; the source does not supply the hardware prerequisites or a separate procedure for those vehicles.
Illustrated installation procedure
Full-size image
Coding and functional verification
The retrofit described in the source requires vehicle coding and road-test matching after installation. The source does not supply radar part numbers, vehicle-specific coding values, or a calibration and road-test procedure.
Obtain the vehicle-specific coding and radar-matching procedure before enabling or road-testing this retrofit. Have a qualified technician verify the installation and required checks.
Spot an error or an unclear step? Please contact the CKCP representative who supplied this guide and include the step or image number, vehicle model and year.