anyone know the sequence from plugs to cap on a 500se v8 (uk)
 

think i got the leads wrong when i changed them

The firing order should be 1-5-4-8-6-3-7-2. #1 cylinder is the front cylinder on the passenger side. If you remove the distributor cap you will see a mark where the rotor would point with the engine on TDC. The firing order goes clockwise on the distributor. HTH:)