2004 Mercedes-Benz SL600
Mileage
78,139
Service Date
1/9/2026
Services Performed
- Check Vehicle for Trouble Codes ; Engines = Found codes for cylinder misfires on cylinders 11 & 12. Inspect engine and found wastegate vacuum line broken for Lt/side cylinder bank. Also, noticed that Ignition Control Module is older style with plastic housing cover ; Recommend replace with updated Ignition Module. ,,, Repaired vacuum line and cleared all trouble codes. Perform Drive Cycle Road Tests ; Check engine light came back on. Check vehicle for trouble codes ; Engine = P2050 (Misfire Damages Three Way Catalyst), P205A (Misfire of Cylinder 12, damages Three Way Catalyst). Vehicle does need new Ignition Control Module. Recommend to replace the Ignition Control Module with updated version ; Then clear trouble codes and road test. However, if misfire codes are redetected, then also recommend to remove both side ignition coils to inspect spark plugs condition and replace plugs.
- Function Check Hard Top ; found top would not operate one time, but cycled the key and then top operated without issue. Check Hydraulic Fluid level and condition ; Level and condition are Good. Check top for trouble codes ; RVC = > B1263-001 (WM63, Vario Roof locked limit switch, right rotary tumbler, WM64, Vario Roof locked limit switch, left rotary tumbler, : One of the components does not operate or has wire break), > B1266-001 (SBD36, Tubular frame open limit switch : The component does not operate or has wire break), > B1266-017 (S118/1, Left tubular frame locked limit switch, S118/2, Right tubular frame locked limit switch, : One of the components does not operate or has Wire break). Additional Diagnosis Required. Client wants to address Check Engine Light concern first.
- IGNITION CONTROL MODULE – Remove and Replace ;
THOMAS J. gave our service a 5 star review on 1/9/2026
