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hi if you need any more info, theres a lot here http://www.jagrepair.com/ electrical diagrams and workshop manuals which may help cheers Joe

Hi Rik. I think when you have a red light, you have to get a forced regeneration at a garage. Doesn't your handbook explain what to do, what i'm led to believe is if you have a yellow light you can go for a 20/30 minute drive after the engine is up to normal temperature (ie a Hot engine ) to get a complete regeneration. When a Regeneration is starting with my car I find that the the engine revs are idling higher than normal ( up by about 150 revs ) or the exhaust is making a louder noise than usual ( as if there's a hole in the exhaust ) if this is happening don't switch off the engine and go for a drive. Diesels are meant to be Driven as some members say give it a Italian tune or sometimes drive it as if you had stolen it. In nearly 6 years i've never had a warning light come on, i've certainly had a few Regenerations and they can occur when your not suspecting it ( I was recently driving to the Cairnryan ferry and after travelling some 120 miles I pulled into a service station and yep a Regeneration was taking place so just carried on driving and the engine idling revs were back to normal after about another 10 miles ). If a Regeneration is interrupted ( ie the engine being switched off diesel can enter the sump pushing up the oil level witch can cause problems ) which is why most member's put less oil into the engine than is mentioned in the Handbook. I only use 5:5 litres instead off 6 litres and use a Low Ash C1 Oil WSS M2C 934B this is the oil jaguar are now using and we advise to use only genuine jaguar oil and fuel filters. There's also a debate about what diesel too use some members say to use Shell V Power Diesel Or another premium diesel. I hope this has helped in some way, when buying a car it is usually recommended by members to get all fluids and filters changed and then you know how things are within the engine . Regards Tom.