Currently own a CLK V6 Diesel Sport, love it but thinking I'd like to climb the spec ladder. Thinking of buying a CLK Cabriolet 350 Sport, with Xenons. We wanted a cabrio before we bought the Coupe, but Benz didn't do Cabrio & Diesel. We now want Xenons and this seems an uneconomical retrofit. The 350 doesn't look far off the MPG of the diesel. I wonder if the petrol is as nice to drive as the diesel. I'm ex Honda Vtec engines and since having the V6 diesel, loved having full power without appearing to be driving like an idiot. Diesel has 100k on it now, have seen cabrio's with less than 30k. Am thinking I can do this change for less than £10k? Am thinking it could also make economical sense in terms of maintenance for the next three years Opinions?