There's a lot more to towing than just the curb weight of the vehicle. For example SUVs with CVTs often have lower towing capacity than the same SUV with a norm

There's a lot more to towing than just the curb weight of the vehicle. For example SUVs with CVTs often have lower towing capacity than the same SUV with a normal automatic transmission even though they weigh the same. There's a lot that goes into making a vehicle good for towing, and a luxury sedan is not normally expected to have a good towing capacity no matter how much it weighs.