assuming you are talking about the rad switch in the front lower driver side corner of the radiator, then indeed it is a messy job if your newer car is like my old 156 ......if ya have long arms and quick fingers ( when wet . LOL ) you can do it without doing / removing anything else like lowering the radiator . if quick, still expect some leakage however so put a drop cloth or pan underneath . if you are slow getting the new one in then be prepared for a gusher . the cheaper parts are always the harder ones to replace it seems . odd yours would go so quick , that is not common . mine got shorted out necessitating the r/r . i don't have the cross reference number of what i used , but it was a part number i got from Dynamic and it was the correct one . be sure your wires from that switch down so low don't get near the stainless steel
oil cooler lines that run from it towards the backside of the headlight bucket as the wires can get close and then perhaps short out from abrasion as mine did . bill