At a glance
The 2020 Mercedes-Benz CLS 450 has 5 recalls, the most serious being multiple issues with the automatic emergency call system that can prevent the vehicle from reaching emergency services or send responders to the wrong location after a crash.
The eCall system, which automatically contacts a call center when sensors detect a collision, is affected by separate software problems across these recalls. In one case the system may transmit incorrect location data, sending emergency responders to the wrong place. In other cases the system may fail to connect at all, delaying help when it is needed most. Because prior software updates did not fully resolve these issues, multiple repair campaigns have been issued targeting the same underlying function.
There is also a 12-volt battery concern: under certain conditions the battery can lose charge or fail to maintain power, which disables several features that depend on it. That includes the hazard lights, automatic door locks, power seat movement, and the eCall system itself, all of which can become unavailable at a moment when they matter most, such as during or just after a crash.
Rounding out the list, the rearview camera can go dark due to a software error, showing a blank or frozen image on the display screen instead of the live view behind the vehicle. A driver relying on that screen while backing up would have no camera assistance and a reduced view of what is behind the car.
At a glance
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What can fail
The 12-volt battery in the trunk may not be properly secured. During a crash, it could shift and disconnect, disabling safety features like emergency calling, power seats, hazard lights, and automatic door locks.
What the fix does
Dealers will secure the 12-volt battery in the trunk to prevent movement during a crash.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
A software error in the communication module's SIM card can prevent mobile network connection, which disables the emergency call (eCall) system.
What the fix does
The communication module software will be updated at no cost through an over-the-air update or by a dealer.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
A software error prevents the rearview camera from displaying the backup image on the screen.
What the fix does
Dealers will update the rearview camera software at no cost to restore the backup image display.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
The communication module may have been turned off during service, disabling the Emergency Call function that connects your vehicle to emergency services.
What the fix does
Dealers will inspect the communication module and reactivate it if needed, at no cost to you.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
The communication module software may fail to send your vehicle's correct location to emergency services when the eCall system activates during a crash.
What the fix does
A dealer will update the communication module software, or the update will be sent over-the-air, at no cost.
Summarized — see the official notice for exact wording, dates, and contacts.