While checking wiring over the weekend I found the engine control unit on the left fender well. It was attached by one of 3 screws and was quite loose. I got it back tight and checked the connections but it seemed okay. The Idle went bad after warm up and the control unit is really hot. How hot is this supposed to get? Anyone know cost for this if it needs replacement? Is there any way to test it? Thanks in advance!
’85 500SL Euro