IIRC, they were trucks, not limos, but they did have some 'diplomatic' members in the cabs of the trucks.
When this Iraqi Air Force General (Christian) spoke with our group, he said that the truth of that story was that these were Russian scientists and engineers and part of what they were taking with them was either WMD or parts thereof, or proof of the fact that that was what they were assisting Saddam in his building up his stockpiles of WMD.
I know I have some materials that this man brought to our group and will have to do some research on his presentation....but he was astounded that Bush, Cheney nor Rumsfeld would admit that Saddam moved much of such weaponry to Syria yet denied it - why.
My thought at the time was that "we" knew where the stuff went, could keep an eye on it and only wanted to fight one war at a time with a predominately Muslim country so as not to "offend the religion of peace!"