This page covers 3 recalls and 16 owner complaints for the 2019 Mercedes-Benz Gls 450.
Complaints for the 2019 GLS 450 are spread thin across several systems, with no single issue dominating. The most-reported category is the engine and engine cooling, where owners describe intermittent check engine lights that eventually become persistent, with diagnoses pointing to the oil pump valve and camshaft adjuster as failure points. One owner also notes an oil leak from the reservoir alongside a suspension-related warning. Suspension complaints include an "Active Curve System Malfunction" warning appearing intermittently. A couple of owners report the transmission not responding when shifting out of park, requiring a full restart to restore normal function. The complaint set for this model year is small, so these patterns reflect a limited sample rather than a widespread trend.
16
Total Complaints
1
Fire-Related
By System
The 2019 Mercedes-Benz GLS 450 has 3 recalls, the most serious involving a 48-volt ground connection under the passenger seat that can overheat and start a fire.
The ground connection may not be properly secured, allowing heat to build at that point in the wiring until it reaches temperatures that can ignite surrounding materials. On the safety systems side, two recalls affect the vehicle's automatic emergency call feature. In one, the eCall system can become disabled entirely, meaning that after a crash, the vehicle cannot connect to an emergency services center and responders may be delayed. In the other, the system may function but transmit the wrong location to emergency services, sending responders to an incorrect address while occupants wait at the actual crash site. Both failures affect the same real-world outcome: emergency help taking longer to arrive when it matters most.
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
Dealers will inspect and tighten the 48-Volt ground connection as needed at no cost to you.
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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 →
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 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.
