Specification: Button: 3 Button Color: Black Material: Plastic + Metal Battery: Yes (CR2025) Repair Switches: Yes Transponder chip/ electronic: No Fit For : Mercedes C Class (2001-2007) Mercedes E Class (1998-2009) Mercedes CLS Mercedes CLK (2001-2009) Mercedes ML (2005-2010) Mercedes B CLass Mercedes SLK (2005-2010) Mercedes CL Mercedes S Class (1999-2006) Package Include: 1 X Key Case 1 X Battery 3 X Micro Switches Feature: - For Mercedes Benz 3 button remote key fob service repair kit - A perfect replacement for a key with broken buttons or worn key - Existing circuit board and transponder chip can be installed from your original key into the new case. - Ensure original keys look the same, and your existing case has the same type of battery holder otherwise will not work.