Mercedes Sprinter 312 with the 2.9 turbo-diesel. Spent weeks on holiday, driving around eastern Australia. Fitted the chip just before I left. It goes very well indeed - there is more power (of course), and the power delivery is much smoother than when unchipped. This may not translate well, but the engine feels "creamier". Excellent mid-range torque. I was passing cars going UP the hills at 100 kph - which, in a Sprinter long wheelbase high top reisemobil, is unusual.
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