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.
What the fix does
This page covers 10 recalls and 14 owner complaints for the 2022 Mercedes-Benz Gls 450.
Complaints for the 2022 GLS 450 are spread across a small number of reports, with forward collision avoidance drawing the most attention. Owners describe the automatic braking system activating unexpectedly in normal traffic with no obstacle present, which they note creates a rear-end collision risk. Several also report the forward collision and lane-departure systems shutting down or going offline without any apparent weather-related trigger. The powertrain and speed control categories each account for a couple of reports, though the details across those are limited. Outside the driver-assistance systems, one owner reports the panoramic sunroof glass shattering without warning while driving, and a separate isolated report describes a parked vehicle catching fire with no warning indicators illuminated beforehand.
14
Total Complaints
2
Crash-Related
1
Fire-Related
By System
The 2022 Mercedes-Benz GLS 450 has 10 recalls, the most serious being a steering coupling screw that can loosen and detach from the steering gear, causing a complete loss of steering control.
Two separate recalls cover a fire risk from the 48-volt electrical ground connection under the front passenger seat, where a loose or improperly secured bolt can cause the cable to overheat. On the fuel and drivetrain side, the fuel pump can shut down without warning and cut drive power, and a separate transmission software issue can cause the engine to stall if the transmission fails to downshift properly in certain conditions. Both the fuel pump and transmission issues can leave the vehicle decelerating unexpectedly in traffic. The third-row seat backs have a recall as well, where the locking mechanism can fail in a crash and allow the seat back to fold forward, failing to restrain occupants properly. There is also a concern with the rear door window trim bars, which can detach while driving and become a road hazard. Rounding out the list, the automatic emergency calling system may not function correctly, preventing contact with emergency services after a collision.
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.
What the fix does
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Complaints are owner-reported and reflect individual experiences, not confirmed defects. They are distinct from recalls. Data sourced from the national vehicle safety complaint database. See trending complaints →
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 transmission may fail to downshift completely in certain conditions, which can cause the engine to stall.
What the fix does
Dealers will update the transmission control unit software 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 unexpectedly shut down, causing the engine to lose power while driving.
What the fix does
The fuel pump will be replaced at no cost to you at an authorized Mercedes-Benz dealer.
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
The trim bars around the rear door windows can detach and fall off while the vehicle is being driven.
What the fix does
Dealers will inspect the rear window trim bars and secure them 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 screw that locks the steering coupling to the steering gear can loosen or come off, which could cause you to lose control of the steering.
What the fix does
Dealers will replace the steering coupling locking screw at no cost to you.
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.