This text start with a customer question: Question: Can this SMART Key Teach-in work on Mercedes C300 2008 year? A: Sorry, it cannot. SMART Key Teach-in supports Benz Smart with K-line protocol from 1998~2002. Smart Key Teach-in Supports ECU TYPE: When to use Smart Key Teach-in? Smart Key Teach-In OBDII key device is intended for locksmith workshops, auto services, auto garages. MB…