Some great advice and comments in the posts.

I've towed a 2 ton Jeep on a 1 ton trailer fror more than 10,000 miles around Europe (motorway and mountain passes) with my X5. It's rock solid in most conditions.

The key for me has always been spot on nose weight. Get that wrong and you'll be in real trouble with snaking. Add to that modified driving behaviour and I foreseee no problems

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X5 3.0i Sport - Brembo rotors, Hamann Exhaust, custom Xenon & AE lighting, Retrofit Bluetooth
Z4 3.0i Roadster
CJ10a Jeep
TJ 'Challenge' Jeep