Assembly with a planetary gear train for a motor vehicle, a motor vehicle and a method for operating a planetary gear train

A motor vehicle, comprising:

• a combustion engine;
• an electric machine;
• a planetary gear train having a ring gear, a sun gear, a plurality of planetary gears rotatably mounted on a planet carrier and interacting with the ring gear and the sun gear, said planet carrier coupled to the combustion engine;
• a belt drive having a pulley and coupling the electric machine with the sun gear,
• an overrunning clutch coupling the sun gear and the planet carrier with one another,
• a clutch configured to couple the sun gear and the planet carrier directly with each other in parallel with the overrunning clutch,
• a first measuring device measuring at least indirectly a rotation speed of the sun gear,
• a second measuring device measuring at least indirectly a rotation speed of the planet carrier, and
• a control device configured to receive measurement signals from the first and second measuring devices and to close the clutch in response to at least one predetermined condition relating to at least one of the measured rotation speeds.