"Replacement Mercedes-Benz Key Blank One Mercedes-Benz Key Blade S48HF-P / HU39-P / MB48*** for the following models: W124 E-class 1986-1995 W126 CL & S-class 1984-1992 W140 CL & S-class 1991-1999 R107 SL-class 1984-1989 R170 SLK-class 1997-2005 R129 SL-class 1989-2003 Other Models - compare the Key Blade with your original key. ***The Mercedes-Benz key blade must be cut to match your original key in order for it to work on your vehicle. Key cutting services are available through United Auto Security, or you can inquire with your local automotive locksmith. If your Mercedes-Benz was built before 1996, this key will function as your original key. If your Benz was built after 1996, this key will open the doors, trunk, and glove box but will NOT start your Benz because it does NOT have a transponder. Notes: This is an aftermarket key remote. United Auto Security is not affiliated with Mercedes-Benz.