If the latches do spring back till the end, you can try to re-adjust the bumper/stops to the entire minimum. Check whether the bolts that fasten the hook on the hood are tightened well and close it and check whether the cable and incar-hood handle do spring back as well...
I have seen hoods that were not closing anymore because of the hood-handle staying "open".

It should close with a flexible latch and a minimum adjusted bumper/stop. If the hood does shut properly, you might adjust the bumper/stops again...

...just a thought...

greetingz,

__________________
1990 300SL-24
1993 C250D with a minor 600+k kilometer
www.MBenzNL.com(the Netherlands)