try williamsdiesels.com he did our van, he did call out a specialist to remove one of the injectors, they used a hydraulic press and 15 tonnes of pressure. He also used a fizzy drink to remove the toffee like gear secreted all around the injectors. Merc quoted us for a new engine and said it would be impossible to change the injectors, so the mobile mechanics charge of £400 was very reasonable, also cut us a spare key aswel f.o.c. ha ha ha, good knowledgeable bloke who came. All the best hope it helps, Mike
Mike Leaver
October 2009