Stoyan,
Tool 1676T is illustrated on page 32 of the drawings section of the workshop manual.
A 1/2″ drive socket version is available – at enormous expense – from CTA in Holland – see here:
http://www.ctaservice.nl/product/22098/dop-voor-t-sleutel-1676-t-
If you live conveniently close enough to arrange collection I would be prepared to lend you the correct tool against a small deposit (it is too awkward to post because of the length). Where are you situated?
B…………..
Bernie