Make sure you have been working her on the basic retriever obedience commands so that you can keep her in tow in the field. (easyretrievertraining.com)
For an SUV that isn't truck - based, the X5 has a healthy trailer towing capacity of 6,000 pounds, regardless of drivetrain. (cars.com)
Power locks and windows along with towing package.. (shoppok.com)