Thanks to Spac, I've sourced a towbar for my wife's xc70. I was looking online and found the Volvo towing harness at eEuroparts, but they don't seem to ship to Australia anymore.
Fcp have the same sku listed as not fitting a 2005 xc70. The sku is 30664651 (https://www.fcpeuro.com/products/tow-hitch-wiring-s60-s80-v70-30664651). Does it fit a 2005 xc70 or only a v70?Fcp also state I need an additional module, sku 30664974 (https://www.fcpeuro.com/products/volvo-trailer-control-module-genuine-30664974) Do I need both of these to be able to have working lights on a trailer?