I’m looking to buy a vehicle to tow a large Airstream caravan. My wife's Bentley GTC is too light apparently and we worry about long-term body distortion. Given the weight involved, 2680kg, I can only find the Range Rover and Mercedes-Benz GL 4x4 that are heavy enough for the job. I'm not too keen on Range Rover build quality and I lack the required sense of humour required to endure Mercedes-Benz's service departments. The vehicle must have excellent engineering and build quality. Our budget is £50,000 to £80,000 for a newish tow vehicle that would have a projected annual mileage of 5000 to 8000 miles.