The name written in the address is not important. It is there only for Google and as an indication of link contents.
e.g.
http://www.imcdb.org/vehicle_100075-Chrysler-300-C.html
http://www.imcdb.org/vehicle_100075-a-big-american.car.html
both works the same
I do not know why it did not work with 100000 for you
http://www.imcdb.org/vehicle_100000-here-is-the-one-you-search.html
The text after the number can be deleted, but the "-" after the number has to be kept (I should fix that)
e.g.
http://www.imcdb.org/vehicle_100000-.html