Mercedes Benz, Ford, Porsche, VW camera retention adapter.
ACV 771000-2010, Connects2

Camera Retention Interface. Retains OEM reversing camera when upgrading to an aftermarket head unit.

Ford with Blaupunkt OEM Sat Nav.

Mercedes with Audio 50 APS, Comand NTG2, NTG2.5 OEM Sat Nav, 
Mercedes A class, C169, W169 (2004-2012),
Mercedes B class, T245 (2005-2011),
Mercedes C, CLC class, CL203, S203, W203 (2004-2011),
Mercedes CLK class, W209 (2005-2010),
Mercedes CLS class, C219, W219 (2004-2010),
Mercedes E class, S211, W211 (2002-2009),
Mercedes G class, W463 (2007-2012),
Mercedes ML, GL class, W164, X164 (2005-2012),
Mercedes R class, W251 (2005-2010),
Mercedes SL class, R230 (2006-2011),
Mercedes SLK class, R171 (2004-2011),
Mercedes Sprinter, W906 (2006-2018),
Mercedes Vito, Viano, W639, W447 (2003-2023*)...

Porsche with PCM2.0, PCM2.1 OEM Sat Nav,
Porsche 911, 997 (2004-2009),
Porsche Boxster, 987 (2004-2009),
Porsche Cayenne, 9PA/955 (2002-2006),
Porsche Cayman, 987C (2005-2008)...

VW Crafter I, 2EC, 2EK, 2F (2006-2016)...

* Vehicles with Garmin Audio 30 OEM Sat Nav with camera range adjustable not supported.