Mercedes-Benz GL350 check engine and ABS light on after filling diesel fuel tank on Mercedes-Benz GL350

Some Mercedes-Benz GL350 owners report experiencing the simultaneous illumination of the check engine and ABS lights after filling the diesel fuel tank, which can signify serious issues. The check engine light may indicate problems with the engine or fuel system, potentially linked to faulty sensors or fuel-related issues. Meanwhile, the ABS light warns of potential malfunctions in the Anti-lock Braking System, which is vital for safe vehicle operation during braking. Owners have noted that these warning lights can stem from various causes, including inaccurate data from wheel speed sensors or other underlying issues that necessitate prompt diagnosis. It is crucial for owners to seek professional assistance to diagnose and resolve these problems quickly, as driving with these warning lights activated poses significant safety risks.