Specification:Button: 3ButtonColor: Black Material: Plastic + MetalBattery: Yes (CR2025)Repair Switches: YesTransponder chip/ electronic: NoFit For :Mercedes C Class (2001-2007) Mercedes E Class (1998-2009)Mercedes CLSMercedes CLK (2001-2009)Mercedes ML (2005-2010)Mercedes B CLassMercedes SLK (2005-2010)Mercedes CLMercedes S Class (1999-2006)Package Include:1 X Key Case 1 X Battery 3 X Micro SwitchesFeature:- 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.