Translation: There were always different rumors about the number of RS2 limos.
Under the picture is an offical Audi statment about this:
Dear Mr. xxx
our research showed that there were 4 RS2 Limousines build. 2 of them went to Saudi Arabia as a special design. 1 Car is in the Audi Museum which belongs to an Audi engineer and of car number 4 there are no known traces anymore. The 2 cars made for Saudi Arabia were much different and can not be compared with the one on the picture.