NHTSA (USA)Critical
At a glance
What can fail
The 48-Volt ground connection under the passenger seat may not be properly secured, which can cause it to overheat.
The 2021 Mercedes-Benz AMG GLS63 has 10 recalls, the most serious involving two fire risks: a fuel pump that can shut down without warning and cut drive power, and a 48-volt electrical ground connection under the passenger seat that can overheat and ignite.
On the safety equipment side, the third-row seatback locks may fail in a crash, leaving rear occupants without proper restraint. There is also a fire risk tied to the air conditioning drain hoses: if incorrectly installed, they can direct water into the passenger footwells, where it can corrode wiring or cause short circuits.
Several recalls affect electronics and visibility. The multimedia system software can cause the display to go black or restart on boot-up, leaving the backup camera with no image while reversing. The emergency call system has two separate issues: in one, the system may fail to connect to the emergency services center at all; in another, it may send responders to the wrong location. Interior switch illumination can also fail, making controls harder to find while driving.
On the exterior, rear door window trim bars may detach at speed and become road hazards. There is also a recall for the instrument panel switches losing their backlight, which can make them harder to locate and operate in low light.
At a glance
What can fail
The 48-Volt ground connection under the passenger seat may not be properly secured, which can cause it to overheat.
Looking to upgrade?
Find accessories for your 2021 MERCEDES-BENZ AMG GLS63 at Amazon.
We may earn a commission for purchases made through these links.
What the fix does
Dealers will inspect and tighten the 48-Volt ground connection as needed at no cost to you.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
The fuel pump may shut down unexpectedly, causing a loss of engine power while driving.
What the fix does
Dealers will replace the fuel pump at no cost to you.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
Air conditioner drain hoses may be incorrectly installed, allowing water to drain into the passenger compartment instead of outside the vehicle.
What the fix does
Dealers will inspect the air conditioner drain hoses and reinstall them correctly at no cost.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
The locks securing the third-row seatbacks may fail during a crash due to a manufacturing error, potentially allowing the seatbacks to move unexpectedly.
What the fix does
Dealers will inspect and replace the third-row seatback as needed at no cost to you.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
The trim bars around the rear door windows may come loose and detach due to a manufacturing error.
What the fix does
Dealers will inspect the rear window trim bars and secure them as needed at no cost.
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
The ground cable bolt for the 48V electrical connection under the front passenger seat may not be properly tightened, which can cause the cable to overheat.
What the fix does
Dealers will inspect and tighten the ground cable bolt as needed at no charge.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
The MBUX multimedia system software may cause the display to go black or restart after startup, preventing the rearview camera image from displaying properly.
What the fix does
A dealer will update the multimedia system software, or you can receive the update over-the-air, at no cost.
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.
At a glance
What can fail
The instrument cluster software may turn off the lights on certain interior switches (switch bar, overhead controls, steering wheel) when hazard lights are on and the ignition is off.
What the fix does
Dealers will update the instrument cluster software at no cost to restore proper switch illumination.
Summarized — see the official notice for exact wording, dates, and contacts.