** Stroeer SAXG.DE shares surge 17.4% after Bloomberg News
reported the German advertising group is mulling a potential
4-billion euro ($4.10 billion) sale of its billboard unit
** Company is working with advisers and has received
interest for its billboard unit from private equity firms
including Hellman & Friedman and KKR KKR.N , the report said,
citing people familiar with the matter.
** The group's stock is on track for its best day since
November 2011, and tops Germany's midcap index .MDAXI
** Stroeer did not immediately respond to a Reuters request
for a comment
($1 = 0.9748 euros)
(Reporting by Tristan Veyet; Editing by Amanda Cooper)
((Tristan.chabba@thomsonreuters.com))