Employees of Daimler AG watch from a parking garage a demonstration of several thousands of employees in front of the Mercedes-Benz production site in Sindelfingen, Germany.

SINDELFINGEN, Germany — Thousands of workers at carmaker Daimler AG's Sinelfingen plant in southern Germany protested for a second day today against possible plans to move some production of the Mercedes C-Class line of cars to a plant in Tuscaloosa, Alabama.

A decision on the matter, which threatens about 3,000 jobs in Germany, could come later in the day.

"We will not let our jobs vanish to Nirvana without a fight," Erich Klemm, the workers' council president told about 12,000 protesters.

Daimler, based in Stuttgart, is considering the move to take advantage of lower production costs in the U.S. and to avoid currency fluctuations.

Klemm said the C-Class line was of central importance to Sindelfingen, the company's biggest car production facility in Germany. If the move takes place, production could start in Alabama in 2014.

Klemm said the security of the German jobs is more important than the perceived benefits. He said maintaining production at the current locations is "economically sensible and possible."

The C-Class line, which includes a sedan, coupe and wagon, is built in Sindelfingen and Bremen, as well as in South Africa and China.

Employees from carmaker Porsche AG and car parts maker Bosch GmbH, also based in Stuttgart, joined in the protest in solidarity.

"Our region and our families live from Daimler," Bosch workers' council president Hartwig Geisel said.

"It's feared that with job losses at Mercedes, jobs at suppliers will also go," Geisel said.

Shares of Daimler were 2.5 percent higher in Frankfurt morning trading.