Acura
RDX
Owner report available
Mercedes-Benz
GLC
Owner report available
Acura RDX vs Mercedes-Benz GLC
The short answer
Based on available data, the Mercedes-Benz GLC comes out ahead of the Acura RDX on power. Check the specs table and owner sentiment below for the full comparison before deciding between the two. Both are covered by real owner reports on CarWizz.
Specs side by side
What owners say
RDX
Overall
Owners of the second-generation RDX (roughly 2013-2018) are overwhelmingly positive, repeatedly describing the V6 as smooth, potent, and long-lived, with many reporting 150,000 to nearly 300,000 miles on basic maintenance. The third-generation RDX (2019 and later) draws a split verdict: owners praise the turbocharged engine's mid-range punch, handling, and available ELS audio, but a substantial group reports infotainment problems, interior rattles, brake noise, and occasional turbo or head gasket failures. A recurring theme is that the older naturally aspirated V6 is viewed as the more trouble-free long-term choice, while the newer turbo four is seen as more fun but less proven.
Best version to buy
Insufficient owner data available to declare a single consensus. The strongest signal favors the second-generation V6 models, with 2013-2015 and 2017-2018 examples drawing the most praise for reliability and longevity, and the 2016-2018 facelift years noted for holding up well past 100,000 miles.
Known issues
- Infotainment system freezing, slow response, and night/day mode glitches: Frequency: very frequent (concentrated in 2019-2020 model years). Panoramic sunroof rattles, popping, or leaking: Frequency: recurrent (2019-2022 model years).
GLC
Overall
Sentiment is mixed and heavily dependent on model year, powertrain, and ownership expectations. Positive feedback centers on the vehicle's premium interior quality, comfortable ride, and the powerful, enjoyable performance of AMG 43 models with the six-cylinder engine. The plug-in hybrid GLC 350e receives praise for its electric-only capability and overall driving experience.
Best version to buy
Insufficient owner data available to declare a single "best" version, but clear preferences emerge. For performance, the AMG GLC 43 with the six-cylinder engine is favored over the four-cylinder AMG 53 models, with owners appreciating its power and character.
Known issues
- High maintenance and repair costs: Astronomical bills for parts replacement cited (e.g., $3,000 for a cracked headlight, $4,000 for a power steering rack). Frequency: very frequent.
- Engine reliability concerns: Specific issues with M274 and M264 turbo four-cylinder engines, including cracked pistons and cylinder head/valve problems. The 2.0L engine in the GLC 300 is also described as "seriously underpowered" by some.
- MBUX infotainment/electronic glitches: System failures include inability to connect to satellites, inoperable cameras requiring system resets, failed over-the-air updates, and general software instability. Frequency: recurrent.
The verdict
The Acura RDX is the better choice for most buyers.
It has stronger reliability sentiment in owner reports than the Mercedes-Benz GLC, based on the data above. If the specific known issues on the Acura RDX are a dealbreaker, the Mercedes-Benz GLC is worth a closer look instead.
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Common problems by model year
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Frequently asked questions
Which is more reliable, the Acura RDX or the Mercedes-Benz GLC?
Owner reports lean more positive on reliability for the Acura RDX than the Mercedes-Benz GLC. See the known issues comparison above for the specific concerns owners report on each.
Which is better for families, the Acura RDX or the Mercedes-Benz GLC?
Both seat a similar number of passengers based on our data. The Acura RDX is classed as a SUV, the Mercedes-Benz GLC as a Coupe, which affects cargo space and ride height for family use.
Which has better fuel economy, the Acura RDX or the Mercedes-Benz GLC?
The EPA rates the 2026 Acura RDX at 23 mpg combined and the 2027 Mercedes-Benz GLC at 22–27 mpg, depending on the version.
Which is cheaper to maintain, the Acura RDX or the Mercedes-Benz GLC?
Exact maintenance costs aren't in our data, but owner reports mention cost-related concerns more often for the Mercedes-Benz GLC than the Acura RDX. See the known issues comparison above.