Without realising the clutch is often taught incorrectly or not at all on a 450 smart fortwo or 452 smart roadster. The following video shows the flawed method (which the majority of people will inadvertently use) followed by the complete way to teach the clutch using a MB Xentry (Star) Diagnostic Computer. I show the incorrect method first to demonstrate how the values do not always save to the EEPROM memory. This is not always the case but is more often than not. Either way you need to check the actual values afterwards to determine if it has taught completely or not and if not, follow the method given to ensure it is properly taught-in.