two weeks ago had all 5 injector seals replaced because of slight smell in cabin 300 miles later one of them no2 from front is chuffing very slightly, took it back to garage no probs they will do it again, it will be very easy cos its been out once new washer new bolts and clamp ect but cannot do it for a few days, so just out of interest rang local mb dealership see if they could do it sooner!! well came of phone shaking!. easy job 1 hours work they said £100 +parts BUT it could need new injector and new head!WTF thanks i said i will be in touch.thinks i will wait.