I sent a E-Mail to Haynes as below.
Hi
I have a focus C Max 53 with the 1800 Duratec HE engine with electric throttle could you tell me if the engine in the Manual for the ford focus petrol (05-09) is the same setup if not can you direct me in the right direction which might help.
Reply;
Thank you for your email
Although the engine in the Focus hatchback is basically the same there are some unspecified differences when installed in the C-MAX. We are just about to start work on a manual for the C-MAX and we will have a better idea once the project has been started and a vehicle or two has been purchased. Until then we are unable to help with your query and I can only suggest you contact a friendly Ford dealer for advice.
Any advice would welcome The Vicar.