Is a plumbers nightmare. There are still bits I've not properly identified! What is that pipe from the centre cylinder manifild for?
I think it's the EGR tube - exhaust gas recirculation - seeing all that pipework and numerous sensors with titles such as 'Delta Pressure Feedback EGR' it's no surprise really that the Roadster is plagued with MIL issues, mine was never properly sorted and was a factor in me getting rid after 12 months. A shame really because I had very few other issues with the car, but evey few weeks the MIL would illuminate and require resetting, it did go back to MMC but was winking again within a week.