AP02 Transfer Case Chain 42 links For ML GL-Class X164 W164 W251 R350CDI 4matic HV091 2512800800 A2512800900 Transfer case chain with 42 links designed for use in specific models equipped with Steyr single-speed transfer cases.Matches OEM specifications for the following part numbers: HV091, HV-091, A2512800800, 2512800800, A2512800900, 2512800900.Fits models: GL Class X164 M Class W164 M Class W166 R Class W251, V251 Compatible with Steyr single-speed transfer cases on vehicles from 2003 onward, including W163 ML-Class (2003–on), W164 ML-Class (2005–on), and X164 GL-Class (2006–2012).Also fits W251 R-Class models R320, R350, and R550 from 2007 to 2011.Not suitable for non-US ML or GL models equipped with off-road package two-speed transfer cases.