Hi, Recently my C270 CDI estate developed a starting problem. Approx 4 months ago I replaced the fuel filter, and the fuel line between filter and HP pump due to brittle retaining clips. All seemed to be going well, up until a couple of weeks ago when the morning temperatures started to dip below 3-4 DegC. on the first few occasions, it required quite a lot of cranking to fire 20 seconds (ish). After a couple of days, I was running the battery flat trying. By lunchtime, and several attempts later once the weather warmed up a bit it would eventually fire. If I ran in the morning/afternoon, it would start again in the evening albeit not instantly. However if left overnight, it would not start in the morning. I have checked all 5 glow plugs and the glow plug relay. I have taken it to my local garage and left it overnight for him, and he reported back low fuel pressure on start up. His diagnosis is that the fuel lift pump in the tank has failed, Merc want £450+vat for a new "improved unit" complete with new senders. I was under the impression that the lift pump only transferred diesel from the passenger side "return" tank to the drivers side "delivery" tank, so how would this affect fuel pressure? The car runs fine once started. Any help would be greatly appreciated.