Open invitation to tender, deadline 12.10.2012, for refurbishment of the ancient Kaiser Wilhelm railway tunnel (length 4,205 m) including sealing the openings between new and existing tunnels. Time limit for accessing documents: 06.08.2012. Contact DB AG, attn Joerg Hartmann, Frankfurt, tel +49 69265456-99, fax -92. Duration of contract 04.02.2013 to 31.10.2014. Visit http://ted.europa.eu/udl?request=Seek-Deliver&language=en&docid=232826-2012. 30/12.