hi, ive just got myself a hdi vtr estate and fitted a towbar to pull mine and my lads motorbikes around, the thing is fitting the electrics,. 1 person has told me i need a relay and another said i dont. can anyone point me in the right direction please. another small problem is i get the dash warning every now and then that the coolant temp is to high, i know it isnt as it can happen from a cold start or when driving along. the engine has just had the head gasket done, proper job skimmed, pressure tested with new cam and belt kit. any help on these would be great thanks