merc 311 sprinter?

step1) run your vehicle when you start to loose power turn egnition key back one click so engine cuts out and instantly switch backon if power is restored it is an electrical fault step2) change fuel filter put 1 full bottol of red ex injection cleaner to 1/4 of a tank run engine for 10 mins turn engine off leave for 30 mins then take it for a good run if problem still exsists it maybe diafram in the fuel pump take it to deisel repair center. hope this helps

.billy
June 2009