Federal Investigators from the National Highway Traffic Safety Administration are investigating 21 recent reports that tail lights in the 2008-2009 MBZ C-class are starting fires.

“In multiple instances consumers have reported smelling smoke and seeing burn marks in the trunks of the vehicles,” NHTSA said in a statement.

The models affected are the C300, C350, C36 AMG, C43 AMG and C63 AMG sold as 2008 and 2009 models.

Read more about it at the Los Angeles Times.