The Bundesbank, Germany's central bank, has praised the robustness of the country's economy at the end of 2014 and says it may upgrade its growth forecast for this year.
Europe's biggest economy grew by a stronger-than-expected 0.7% in the fourth quarter of last year.
The Bundesbank said consumer spending was the main driving force behind the increased momentum, encouraged by record low unemployment and falling energy prices.
A weaker euro also gave exporters a boost, the central bank said.
The 0.7% expansion in gross domestic product in the final quarter of 2014 lifted growth for the whole year to 1.6%.