Quote Originally Posted by wiggy1406
525 E34 M20 engine

Just changed the Headgasket (as per Bentley Manual). Now re-built, but won't start. The start relay seem to click once, but doesn't turn over....i think its a sensor telling the thing not to start. but i'm buggered if i can find it.

Any ideas??

Mike
Dumb question - have you checked all sensors are connected, and even dumber, has the battery lost charge?
Scott