Exit polls suggested Silvio Berlusconi's centre-right coalition yesterday looked set to win by a narrow margin a regional vote in Sicily seen as a crucial test of national trends ahead of forthcoming parliamentary elections. <br/><br/>The Sicilian vote could mark a striking comeback for the 81-year-old four-times prime minister, whose candidate was predicted to have beaten off a tough challenge from the anti-establishment 5-Star Movement. The centre-left, led by Matteo Renzi's ruling Democratic Party, looked certain to finish a distant third after internal feuding wrecked its chances of retaining power on the Mediterranean island that it had governed since 2012.<br/>RAI state television said Nello Musumeci, backed by centre-right parties, including Berlusconi's Forza Italia (Go Italy!), would win between 35 percent and 39 percent of the vote.<br/>The vote count will begin today and Musumeci's lead is inside the pollsters' margin of error.