Hi there, I've got a W203 C220CDi and the HP fuel pump is leaking a bit. There's a smell of fuel in the cabin when I stop with the engine running. I'm not too confident that I'd be able to refurbish it myself, so I went to Euro Car Parts and they said they had one for a 270 CDi and one for an A Class diesel 170 CDi in stock and that they were effectively all the same part, despite having different part numbers. They are all exactly the same shape and specification and deliver fuel to the rail at the required rate and pressure. The Merc dealer told me a different story and said that I must use the one on his system or suffer the consequences and I'll have to wait until one comes from Germany after the New Year. My question is, could I take one for a 270 and expect it not to blow the arse out of the system? Similarly, would the one for the A170 fit the bill?