thanks for reply, glow plugs at 7C temp I have been informed dont kick in at that temp....could be bad fuel or the actual fuel pump or fuel pump relay....or even a crappy battery that whilst showing is ok with regards to volts has crappy CCA?

Symptoms temps dropped and turning over has got laboured....temps go up its fine again....don't ban me for showing a merc on the site...wish I had it but the rust was too severe and I seized up the engine....RIP 1973-2007

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E53 X5 3.0d SUV prod.date 11/2004 eng.variant M57N Europe Right hand drive N