Distronic at the traffic light

If Distronic is on and stops at a traffic light in front of a car, then my car stops behind it and with short taps of the gas pedal it continues when the car drives in front of me. So far everything is normal, but … If the car is already standing in front of me at the traffic light, when I approach, then my car wants to do a refuelling accident. It does not slow down, so I step on the brake and don’t wait, it would have stopped after all. Am I wrongly programmed or the aut o? In the meantime I had a GLE de with everything you can order. He behaved differently. He slowed down in time and stopped and drove on his own again. So it’s all right if you have enough money. LG Bernd