Exhibit 23.3 CONSENT OF GUNTHER BENZ Ministerialdirigent Ministry of Finance of the State of Baden-Wurttemberg I hereby consent to the use of my name and the making of statements with respect to me under the caption "Official Statements and Documents" in the Prospectus included in this Amendment No. 1 to the Registration Statement, or any amendment thereto. June 27, 2005 By /s/ Gunther Benz ------------------------------- Gunther Benz Ministerialdirigent, Baden-Wurttemberg Ministry of Finance