Mercedes K40 Relay Fix 

This is a k40 relay from a Mercedes and these go out pretty often. Normally, you would send them off or just go ahead and replace them. They can be anywhere from 200 to 300 dollars. So, this is a hack/trick to re-solder the connections that go bad. This fixed my problem with a no crank, no start that it was causing in a 2001 SLK 320.