The C300d AMG Line Edition Premium is a strong pick if you want a luxury-class car that balances refined diesel performance + sporty styling + executive-class comfort/features + practical usability. Good if you care about a mix of power and economy — e.g. motorway commuting, long drives, carrying passengers or luggage (especially as estate). Great if you like a sporty look, sharper styling, and the “presence” of a premium brand and AMG-style touches. Also well-suited if you want a well-equipped interior and modern tech/safety rather than going for a “barebones run-about.”