If you get a aftermarket towbar I would still get the Volvo electrics kit - it's the only one that will disable the reverse lights, fog lights, parking sensors and more importantly enable Trailer Stability Program when towing....
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2011 XC90 D5 Executive
2003 C70 T5 GT
2012 Ford Ranger XL SC
1977 Triumph Spitfire 1500
1976 Massey Ferguson 135
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