STUTTGART, Germany (AP) _ DaimlerChrysler is recalling 136,500 Mercedes-Benz M-class sport utility vehicles worldwide to check for a potential problem with seat belt buckles, the company announced Tuesday.

The problem can lead to the seat belts coming unlatched when put under strain. The defect was discovered during Mercedes' own road tests and has not led to any injuries or accidents, spokesman Fred Heiler said.

He said two consumers have reported the problem.

All car owners will receive letters instructing them to get the problem checked and repaired free of charge, if necessary.

The recall affects all M-class models produced up until July 14 in Tuscaloosa, Ala., or until Aug. 18 in Graz, Austria. The total cost of the recall will be $6.7 million. The recall affects about 85,000 vehicles in the United States, of which less than 1 percent are expected to require repairs for the problem, Heiler said.

Mercedes-Benz USA unit is also recalling 4,400 of its 1997 SL models to replace driver's side airbag modules.