Hi, I know this is a subject that has been at least partially covered in a number of previous threads but I'm after a bit of clarification before i embark on it. I plan to wire into the existing water temp gauge and use an indicator or main/dip beam switch: I have a 2015 420R self build with dry sump. The threaded oil temperature sensor is already fitted to the dry sump tower. I've heard mention that the wiring for the oil temp sensor should already be in place (and the R400 wiring diagram in the manual displays it, though I'm not really sure how to interpret the diagram!) - any idea where this wiring is and what it looks like? I've found a Black/green pair which I must have tie wrapped out of the way on the left side of the engine bay, as per photo, is this the right one - I don't think this which reach to the sensor on the dry sump tower as is anyway so would need extending? /sites/default/files/images/users/12129/20161212_192024_resized.jpg Assuming I can find the correct wiring in the engine bay, be it the above or something else, will the other end of the wiring be conveniently tied off somewhere under the dash, ready to attach to the switch/gauge? Apologies if I've got this completely wrong. Alternatively, if I need to run new wiring the whole way, what wiring and teminals would I need? Thanks for any help. Chris