AP02 Transfer Case Assembly A2512802100 2512802900 for X164 W164 W251 GL420 ML320 ML350 R350 Before installation, ensure gear oil is added to the transfer case. Using the correct gear oil type and proper amount is critical for performance and longevity. Gear Oil Type: 75W-90 OEM Part Number: 2512802100 2512802900 A2512802100 A2512802900 Fit For the Following Models: GL-Class GL 420 2006 / 09-2009 / 05 M-Class ML 320 2005 / 07-2011 / 07 M-Class ML 350 2005 / 02-2015 / 12 R-Class R 350 2006 / 01-2016 / 12 Compatibility Disclaimer: This is an aftermarket replacement part.Any brand names or model designations mentioned are used solely for the purpose of demonstrating compatibility.