I have only seen one reference to towing and that was "manufacturer's estimate" of 7700 lbs. That is in line with prior GLE's except for the full hybrid model which was significantly lower. This is a mild hybrid and and does not have a massive battery pack of its predecessor. The electric motor is also small enough that it should not affect towing capacity but adds greatly to the torque rating. Carrying capacity of the 7 seater is 1623 lbs (3rd row optional and also deletes the spare tire).
Official specs are still pending the dealer release which was originally targeted for this week but has been delayed pending Fed approval. https://www.motor1.com/reviews/27694...s-first-drive/