I would like to know which of the following sentences is correct and if possible, a source accompanying your answer. (Note: Only choose which sentence is correct as regards to the title, do not mind any mistakes you might find in the sentence.)
The Nissan manual is there to help you with any trouble you might have.
The Nissan's manual is there to help you with any trouble you might have.
I do not think there is any difference, but preferably the answer follows British English rules.
Also, there is no specific Nissan, it is just in general.