since this is a common fault I will tell you off my experience / $5 fix
took me a little while to figure out, but traced this fault to a bad fuel pump relay, that wasn't energizing, and the coil had gone open circuit. My guess is they over heat over time and break the thin copper windings.
I didnt replace the whole k40 box, just desoldered the offending relay, and soldered in a us$5 replacement
look for the EURO footprint of any of the below series of relays, remove the 2 piece protective...
slk cranking but not starting, replace relay in k40 box
took me a little while to figure out, but traced this fault to a bad fuel pump relay, that wasn't energizing, and the coil had gone open circuit. My guess is they over heat over time and break the thin copper windings.
I didnt replace the whole k40 box, just desoldered the offending relay, and soldered in a us$5 replacement
look for the EURO footprint of any of the below series of relays, remove the 2 piece protective...
slk cranking but not starting, replace relay in k40 box
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