Audi
Q5
Mercedes-Benz
GLC
Audi Q5 vs Mercedes-Benz GLC: 2026 Comparison
The short answer
The Audi Q5 offers fuel economy, while the Mercedes-Benz GLC excels at power instead. Choose the Audi Q5 if you prioritize fuel economy in daily driving, or the Mercedes-Benz GLC if power matters more for your needs. Both are covered by real owner reports on CarWizz.
Specs side by side
What owners say
Q5
Overall
Mixed sentiment with a clear dichotomy. The vehicle is consistently praised for its superior driving dynamics, handling, and refinement compared to mainstream and some luxury competitors. Owners frequently describe it as "fun to drive," "super quiet and smooth," and possessing a solid, tank-like build quality.
Best version to buy
The 3.0T supercharged V6 engine (found in pre-2017 Q5 models and in the SQ5) is very frequently recommended over the 2.0T four-cylinder for its power, refinement, and perceived reliability. For newer generations, the plug-in hybrid Q5 e is suggested as a high-feature, powerful, and efficient alternative to the performance-oriented SQ5.
Known issues
- ⚠High maintenance and repair costs: very frequent mentions of routine services costing $1,400-$3,000, with out-of-warranty repairs described as exceptionally expensive. Frequency: very frequent.
- ⚠Electronic/Infotainment glitches: includes CarPlay/Bluetooth connectivity failures, random system reboots, unresponsive screens, and parasitic battery drain causing "Low Battery" warnings in new models (e.g., 2025).
- ⚠Sunroof leaks: noted as a design flaw in some generations (e.g., Q3/Q5), requiring extensive disassembly and often recurring. Frequency: recurrent.
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 Audi Q5 is the better choice for most buyers.
It has better fuel economy on its best-equipped version than the Mercedes-Benz GLC, based on the data above. If power matters more to you than running costs, the Mercedes-Benz GLC is worth a closer look instead.
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Frequently asked questions
Which is more reliable, the Audi Q5 or the Mercedes-Benz GLC?
Owner reports show similar reliability sentiment for the Audi Q5 and the Mercedes-Benz GLC. Check the known issues listed above for specific differences between the two.
Which is better for families, the Audi Q5 or the Mercedes-Benz GLC?
Both seat a similar number of passengers based on our data. The Audi Q5 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 Audi Q5 or the Mercedes-Benz GLC?
The Audi Q5 is more fuel-efficient on paper: 2.6-8.3 L/100km combined versus 7.5 L/100km for the Mercedes-Benz GLC, based on the best-equipped catalogued version of each.
Which is cheaper to maintain, the Audi Q5 or the Mercedes-Benz GLC?
Exact maintenance costs aren't in our data, but owner reports mention cost-related concerns more often for the Audi Q5 than the Mercedes-Benz GLC. See the known issues comparison above.