Relay Control Module (RCM) Solder Failure
SeriousElectrics & ElectronicsThe RCM (located in the engine bay fuse box) controls the fuel pump and starter. Solder joints on the board can crack over time due to heat cycles.
By 2006 the Crossfire range included both Coupe and Roadster, plus the supercharged SRT-6. MOT pass rates improved to around 70–80% and build quality was more consistent than 2004 cars, making these a better used buy.
The RCM (located in the engine bay fuse box) controls the fuel pump and starter. Solder joints on the board can crack over time due to heat cycles.
A internal pin in the ignition barrel can jam, preventing the key from turning to the "Start" position. This often requires a replacement barrel or a specialist "pin removal" repair.
The Mercedes-sourced water pump and thermostat housing can fail, leading to overheating. The thermostat housing is plastic and can crack, causing coolant loss.
The Roadster's fabric roof can develop leaks, and the latch mechanism can fail, preventing the roof from sealing properly. The roof hydraulics can also leak.