Engine Malfunction Warning Illuminated with FC 193208: Fuel Level Plausibility Stored in DME. The customer states that the engine malfunction warning lamp is illuminated and, while filling the fuel tank, the fuel gauge did not show the proper fill level. After the vehicle is driven a short distance, the fuel gauge will update to full. When diagnosed, the following fault is stored in the DME: ? FC 193208 Fuel level, plausibility: deviation between consumption and level change Vehicles with option 610 (Head-Up Display) are not affected. Follow the ISTA/D test plan for the applicable faults stored in the DME. CAUSE A software error in the instrument cluster causes the fuel gauge to incorrectly update while refilling.