This adaptor will alleviate problems when towing a caravan or trailer using LED lights. Most modern vehicles can't detect led lights when towing, this plug and play device will solve all problems on dashboard and lights flickering on both vehicles.It is SABS tested and approved for the following vehicles:Ford Ranger / Everest /Spriner / TourneMazda BT 50VW Amarok / CaddyMercedes Benz ML / Vito / Viano, GLC Range Rover – Special