2017 Mercedes-Benz C300
Mileage
40,771
Service Date
4/14/2021
Services Performed
- Disconnected wiring harness to clock spring/stalk assembly from dash. Removed steering wheel and retaining hardware. Removed assembly from steering column. Transferred steering column covers to new stalk and clock spring assembly. Installed new assembly onto steering column and connected wiring. Reinstalled steering wheel and horn plate. Torqued steering wheel nut to spec. Connected wiring to steering wheel controls and air bag. Reinstalled air bag. Started vehicle and checked steering wheel controls for proper operation. All buttons functioning properly. Turned wheel side to side and no noise present in column. Test drove vehicle and checked operation of steering wheel and control stalks. All working properly at this time.
- Inspected vehicle for customer concerns. Verified multiple warning lights on dash, and a clicking noise when turning the steering wheel. Checked operation of steering wheel controls, none are currently responsive. Connected scan tool and performed full body scan. Found codes stored in 7 modules. All codes are for lost communication or open circuits. SRS module has codes for open circuits to driver air bag squibs 1 and 2. Removed air bag assembly and checked air bag circuits for continuity. Found no communication through air bag connectors. Checked continuity at harness connector at dash, ok. Removed horn plate and found steering wheel clock spring is source of noise and cause of lost communications. Recommend new clock spring assembly.
Jane S. gave our service a 5 star review on 4/18/2021
