Recently bought a 53 plate e220 cdi with 100,000 miles on and I'm lookin for advice in the morning on start up I'm averaging 23\29 mpg on a run 37 at best it was only heating up to 70 so changed the thermostat. Running at 90 now also had a full service and 2 new nibs on the injectors but dash miles still no good any ideas why
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