DETROIT - A 46-year-old Mercedes-Benz executive was arrested in Tuscaloosa, Ala., last week during a routine traffic stop for not having a proper form of identification, according to news reports.

The arrest prompted national debate over the reach of immigration laws, particularly those in Alabama, reported Automotive News.

Police stopped Detlev Hager because his rental vehicle did not have updated tags, according to The Associated Press. When asked for his driver's license, Hager could only produce his German identification and was arrested per protocol, said Spencer Collier, director of the Alabama Department of Homeland Security.

Mercedes-Benz is a unit of Daimler AG and it operates a plant in Vance, Ala., that produces Mercedes GL, M, R and C class vehicles.

"[Hager] was arrested under Alabama's motor vehicle code for not having a valid driver's license," Colliersaid. "If you don't have a valid driver's license after a valid traffic stop and the officer can't ascertain that you've ever had a valid driver's license then an officer can bring you to the magistrate."

Alabama's immigration law is considered among the toughest in the nation, according to legal experts. Some parts of the code, such as requiring public schools to determine the citizenship status of students and their parents, have been blocked by federal courts.

And while other portions still remain in question, federal courts have not yet ruled on the legality of the provision used to arrest Hager.

Mercedes-Benz Spokeswoman Felyicia Jerald told other media sources Hager is from Germany and was visiting Alabama on business. He now is back in Germany and not available for comment.

"This was an unfortunate situation, but police followed their standard procedures," the company said in a statement. "Mercedes-Benz will take steps to remind and educate our visiting business guests and employees stationed in the U.S. of Alabama's identification requirements."

It is unclear what position Hager holds with Mercedes or how long he has been with the company.

Hager was released from jail when an associate was able to retrieve his passport, visa and German driver's license from the hotel he was staying at, Tuscaloosa, Ala., Police Chief Steven Anderson told the Associated Press.

Alabama is home to an auto industry that employs thousands of workers through foreign automakers, including Mercedes, Toyota, Honda and Hyundai. Mercedes opened the Vance plant in 1993. The arrest prompted an editorial in The New York Times that noted Germany is Alabama's largest international trading partner. Mercedes recently announced more than $2 billion in new investments in the state through 2014.

"Is this any way to treat a visitor, especially one representing a company that could just as easily invest in some other low-wage state?" the Times editorial noted. "Is this any way to treat anybody at all?"

Collier, when asked whether or not the law could impede international business in the state, said the incident involving Hager was isolated.

"That would be a decision the legislature would have to make," he said. "We're an executive agency."

Collier said he could safely say, however, that the governor has said there may be some areas that need to be looked at "as far as efficiency," though "[the governor has] been very clear that the intent of the legislation will remain and will not be weakened."

Other experts worry the arrest and ongoing debate over immigration laws may backfire at a time of high U.S. unemployment and stagnant wage growth.

"It is really ironic and showed the absurdity of this law," Mitch Ackerman, executive vice president of the Service Employees International Union, told Reuters. "Here you have a foreign employer who has brought many jobs…caught in this web that is supposed to bring jobs."