The Ingenium engines employ Selective Catalytic Reduction which injects 'AdBlue' into the exhaust to chemically convert the NOx emissions. I've not come across any detailed explanation of how this system will operate on the new DS but it is, of course, not uncommon on other modern diesel cars. For example, VW and Merc use it and as I recall, their system is designed such that they claim that the AdBlue need only be re-filled at the service interval - and, they will supply and fill free but only for the first year of the car.
On such cars AdBlue is used at very approximately 1 litre every 5 to 600 miles. Assuming the DS is similar that equates to around 40 litres (or 9 gallons) during the 21,000 miles service interval. I don't use AdBlue but I believe the typical service station cost is about £2 per litre. So although the bulk cost at service is probably less (plus, of course labour to fill and calibrate/reset the system) this is likely to account for, say at least £40 - £50 of the cost of each service. Of course, if you top up your own AdBlue you'll lose some of that benefit!
Incidentally, I wonder where the AdBlue tank is? - if it holds up to 9 gallons, it ain't tiny!
A man came up to me in the filling station on Monday when I was re-fuelling my DS, he asked what I thought of it as his Freelander was in for a service the following day and he was having a DS loan car. He told me that his two year service was going to cost him £411!
Thanks Chippy -
Yes I had seen this and it is, as you say, a very basic but pretty animation of the SCR process. I am familiar with the general principle behind this approach to NOx reduction which has, of course, been used for sometime on commercial diesels and more recently on some cars.
I was not intending to pass any form of judgement on its use, merely to indicate that over the course of a year's driving its cost is not insignificant and if this is absorbed within the 'service plan' cost - assuming that the AdBlue can be replenished at the 21,000 mile service, well and good and adds to its value. I haven't seen any info (though as I have the 'old' 2.2 engine I've not really looked!!) about the AdBlue tank capacity of the new DS and if the owner can self-fill or if they have to lug around gallons of the stuff between services.
Not a great issue but - not having first-hand experience of it - I believe replenishing up the AdBlue is not quite as simple as topping up your oil.
I seem to recall that the new spec released this week has the fuel tank capacity at 54 litres rather than 65 litres previously.
The addition of an 11 litre AdBlue tank? perhaps moulded into the main fuel tank so that it occupies the same space in the vehicle?
I see that the cost of the service plan for the old 2.2 and the new egine is the same over 5 years. With the new engine having a longer service interval this could imply a higher service cost. Although LR could be just pitching it at the same cost.