Complex sentence: Another innovation is the optional "2-tronic" manual-automatic transmission system, which shares the 206's 1.4 L and 1.6 L petrol and 1.4 L Diesel engines.
Split into simpler sentences: Another innovation is the optional "2-tronic" manual-automatic transmission system. It shares the 206's 1.4 L and 1.6 L petrol and 1.4 L Diesel engines.