This is probably not what you want to hear, but I think you would be crazy to borrow €35k to spend on a car. If you don't have this money saved, then buy a much, much cheaper car and start building up some savings. Your €35k loan will cost you €2k in interest per annum, or €10k over the lifetime of a 5 year loan. As a BOI shareholder, I'd be delighted to see you making such a generous contribution to our profits.
By opting for a fixed rate loan, you are gambling that rates will increase over the life of the loan, and eliminating any flexibility you may have for making additional payments and/or paying off the loan early without penalty.