[quote=groovyjay]Thanks for the info Geordie, I had no idea there was such a mod available through the dealers! I'll make a quick phone call to my dealer on monday to see if it would be possible to have it installed on my car and still have the factory warranty!
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Just received an update from my contact at Startech re the SD6 Tuning Kit. Apparently when driven under 'normal' conditions a 300C CRD fitted with the SD6 Kit will use LESS fuel as less throttle is needed owing to the increased torque. When the vehicle is otherwise used (presumably foot to the floor etc) the vehicle will use an increased fuel consumption of between 1/2 and 1 litre per 100km (don't know what the US / UK conversion figure is).