Hi Aidan I know its a month since you did the job but was interested if you fixed the problem.We do alot of sprinters and one thing to watch out for is the clutch switch.It can give you intermitent loss of power.If you depress the clutch and rev the engine you can only get 2500rpm.when faulty the switch gives the down position even though the pedal is up. Hope this of help if you get another Andy