Summary
The Mercedes-Benz CLS Class has 9 recalls spanning 2012 to 2021, with the most serious being a loose 48-volt ground connection bolt on 2021 models where the wiring can overheat and melt, creating a fire risk.
The 2021 model year carries two additional safety concerns. Front seat position switches may not read occupant position correctly, which can cause airbags and seatbelt force limiters to perform incorrectly in a crash. Separately, the passenger seatbelt's automatic locking retractor can fail to lock when used to secure a child seat, though the lower anchor system on these vehicles is not affected by this defect and remains usable for child restraints.
On 2019 models equipped with the six-cylinder gasoline engine, coolant pump wiring can contact the engine fan, become damaged, and cause the pump to stop working. This can lead to engine overheating and stall, and can also knock out the 48-volt electrical system while the engine is running. There is also a lighting compliance issue on certain 2019 models where the headlamps allow for horizontal adjustment in a way that does not meet Canadian safety standards.
The 2018 model year has a recall where the passenger seat sensor can fail to deactivate the front airbag when a child seat is placed in that position, meaning the airbag can deploy toward a child in a crash.
Going back to 2015, a rubber seal at the top of the engine compartment bulkhead can work loose and drop down onto exhaust components, creating a potential heat and fire concern. On 2012 models, the four bolts securing the secondary hood latch striker plate can loosen, and if two or more back off, the secondary hood latch loses its ability to catch the hood if the primary latch releases while driving. A lighting compliance issue also affects certain 2012 models, where rear side marker lights may not meet photometric output standards for Canadian regulations.
