Hi helpers
So here is the update.
Pizzaguy you will be pleased that I have had the Relay Control module resoldered- got the board checked by a TV service team here in New Zealand- found faulty solder joints- Tick
Replaced the CPS bought for $80 NZ from super cheap. Same part $170 at Mercedes-Tick
Turned key started or should I say fired and ran for a second or two then died. Now same fault turn key and let go and the key stays in crank position with car turning over. Manually turn key back to stop cranking.
I can smell fuel so I think pump must be supplying fuel.
GRRRRR That what I get for not using it very much lol

Any ideas?