Complex sentence: In the French market the Renault 10 found itself struggling to compete with the successful Peugeot 204 introduced in the same year, and just two years after launch the 10 itself was facelifted, rectangular headlights now further differentiating it from the Renault 8.
Split into simpler sentences: In the French market the Renault 10 found itself struggling to compete with the successful Peugeot 204 introduced in the same year. Early R10 had round headlights, but just two years after launch the 10 itself was facelifted, rectangular headlights now further differentiating it from the Renault 8.