Car Mechanics (UK)
► This 2006 smart car was running well, but the owner had an intermittent problem regarding the ABS braking system. This would occasionally throw up a fault code but, after turning the ignition off and on again, the code would disappear for a time. He suspected the problem to be the nearside rear ABS sensor, as a mate’s diagnostic reader had thrown up a code relating to this. Unfortunately, after changing the sensor, the problem remained.
Inspecting the smart car, we discovered that he was in the right area, but had the wrong component. The problem lay with the reluctor ring, which had corroded and begun to lose its castellation. Mercedes-benz will only supply a new shaft, but we did find a company that would sell us the reluctor ring on its own, enabling us to keep costs at a reasonable level.