Sep 20, 2018 · The TCS warning light will pop on when the system detects a loss of traction, like in snowy or rainy weather. Typically the light is seen when the system intervenes to maintain traction. It may light up for a brief period and then go off, or it may flash while it is operating. The E39 offered an artfully polished chassis set-up from the factory. Good drivers instinctively knew how to get the best from it. The E60 M5 swamped the customer in choices because this was a vehicle with almost 600 permutations of gearshift method, power settings, shift speeds, suspension adjustments and traction control thresholds.
Oct 03, 2020 · This can start as an occasional flashing yellow light before it becomes permanent. In most cases, the ABS pump will begin to fail, affecting the brake lights, DSC, and ABS. The ABS control unit has solder joints that break over time. By unplugging and replugging the module, you can check if it is the ABS control unit that is malfunctioning.