Renault's chief executive, Carlos Ghosn, is facing his toughest challenge since stepping into the top job in May this year. Shares in the French car maker fell nearly 8% yesterday after it warned late on Wednesday that its operating margin this year would fall from over 4% to "more than 3%".
Mr Ghosn was credited with turning around the Japanese car maker Nissan, in which Renault has a 44.4% stake; now he has to tackle fierce competition in Europe.
Renault's market share fell below 10% last month despite the September launch of the new Clio, voted European car of the year.