There's a micro switch on the drivers side latch under the scuttle panel at the front of the bonnet. If you find the 2 lead connector by the right hand headlight and disconnect it you can insert a paper clip bent into a 'U' into the feed side and this will make the circuit and fool the ECU that the switch has closed the circuit. Make sure to insulate the exposed part of the paperclip to avoid short circuits to earth. This will give you time to deal with the problem at your leisure. I sprayed copious amounts of WD40 into the latch recess and it freed up the sticking micro switch. If that doesn't work it's apparently a very fiddly job to access the latch and replace it. If you can't get the part in Lithuania, you might have to either fit your own bell push micro switch on the scuttle panel where the bonnet can operate it, or just leave the circuit closed with the paperclip and do without a bonnet warning light.
See my previous posting/thread on this issue.
https://www.volvoforums.org.uk/showthread.php?t=279884