202 589 12 63 00 Test cable, 61-pin - WS35.00-P-0152B
WARNING: This page is about a different car, the 2012 Mercedes-Benz C300, 2011 Mercedes-Benz C300, 2010 Mercedes-Benz C300, 2009 Mercedes-Benz C300, and 2008 Mercedes-Benz C300. However, it is still accessible from the selected car via links, so may be relevant.
FG 35/Set B
MODEL 202, 210
Use/specification:
Test cable, 61-pin, for diagnosis of systems ETS and ASR in combination with socket box 129 589 00 21 00