yes that will be the one, see the link below

http://www.bhpplus.co.uk/Speedhawk-Diesel-Tuning-Box-Common-Rail.html?carid=723&box=true&Info=Renault%20Laguna%202.0%20dCi%20150%20BHP%20CR-2

Neither, the 9 settings are there to allow you to set the box up and fine tune it to your car, the 9 settings should not be thought of as Hi – Lo or Fuel economy and performance, simply to optimise the performance of your car with the box fitted.

The PD box was designed for a group of 4 engines that work in a completely different fashion to the common rail box that you are referring to, because it uses different hardware to achive its results it only needs the 4 programs to gain the same results, it also has an adjustment of plus and minus 30% going in steps of 10% so has 7 different settings of fine tuning as a result, this is effectively what the 9 settings do on the common rail tuning box, because of the hardware involved this also relates to the increase in price as they are more costly to produce.

unfortunately we have no solutions for large commercials at this time.

The theory is infact the opposite of that, the more power you have means that the vehicle doesn’t have to labour quite so hard, meaning that it should pull more effciently up hills with less revs therefore using less fuel, rather than having to rev it quite hard to get it to go up the hill, if you then however use the extra power to drive everywhere faster then you will use more fuel.

It should certainly show some gains in economy, it also may well add an extra couple of MPH to the top speed, to give you exact gains on economy is imposible as it depends on where and how the vehicle is driven.

No your engine will not die early, this tuning box enhances the performance it does not push it to its limits.