Hi, everybody, I’m on vacation and I’ve traveled 440 km in one direction with my W166 350 Bluetec. 70 km from home the engine control light went on, but the car was driving perfectly without any changes in drive or acceleration. The only problem was that at highway speeds of 90-100 km/h there was sometimes a hesitation or a jerk. When driving at 130 km/h the problem does not seem to be repeated. My first thought was a force majesty. fproblem, because the fuel quality is a bit suspicious where I live. That’s why I filled up the tank in the EU country where I travelled, and since refueling the problem did not occur even when driving at 90-100 km/h. Before leaving there were no fault codes in the storage because I scanned with Xentry. What can cause such a problem, as described above, if you drive at high speed on the highway? Since the problem after refueling is not meh r occurred, do you recommend to scan the car where I am or to leave it at home? Do you think I have to worry on the way back because the control engine is switched on and I have covered 370 km? Thanks in advance. P.s When I filled the tank before the trip, I added Liqui Moly diesel cleaner for preventive maintenance, as I have already done with the models W211 and W164, which I had previously.