F1: Lotus reveals Mercedes fallback plan - F1i.com
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Lotus E23 Hybrid - F1technical.net
Xbox invites fans to beat Lotus F1 Team driver Romain Grosjean and Head of Xbox Phil Spencer for ultimate bragging rights in “Forza Motorsport 6” - Microsoft Stories Asia
Lotus confirms switch to Mercedes engines for 2015 F1 season - MotorSportsTalk | NBC Sports