I've recently refitted the cylinder head back on my Merc after completely overhauling it. It has run like a dream since, for 50 miles that is, whereupon it stalled in traffic and simply refused to start again! It's now been recovered to my home.
Does anyone have any ideas as to what may have happened bearing in mind that all the engine managment sensors where disconnected to remove the head?
PS. does anyone know where the fuel pump relay is located?

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