Audi Vs. Mercedes-Benz Reliability: The Winner Makes Almost No Sense
German cars have a reputation for being high-tech machines, capable of tackling mountain passes, long highway trips and the school run all without breaking a sweat. But not all German cars are built the same, and the complex cutting-edge features that many premium models have, can end up causing headaches for owners if they fail or malfunction.
We decided to pit Audi and Mercedes against each other across several key segments, to see which manufacturer has managed to deliver the most durable and reliable models over the past few years. Audi is known for its exceptional interior build quality, sure-footed quattro all-wheel drive systems and head-turning designs. Meanwhile, Mercedes has traditionally been the pinnacle of prestige and luxury, delivering superior quality cabin materials and a refined ride over outright dynamic ability. These days, the boundaries between the two have become blurred, as both offer sporty, luxurious, and very well finished vehicles across virtually every segment they compete in.
Looking at sales volumes over the past five years, Mercedes-Benz has consistently outsold Audi, with around 284,000 vehicles sold compared to just over 200,000 over the same period. But both have experienced a downward trend over the last few years due to supply chain backlogs, competition in the luxury EV market, and a shift in their product portfolios as they try to recapture lost sales. But, while flashy new designs can help temporarily boost sales, it is a model's reliability that will help maintain that momentum, especially in a market segment where vehicles are pricey and consumer expectations are high.
We looked to Consumer Reports (CR) reliability data to ensure that the comparison was fair, as CR is a trusted, completely independent source that doesn't accept corporate advertising and purchases all test vehicles anonymously. The predicted reliability scores below are derived from CR's extensive member surveys. This score reflects a brand's predicted reliability by analyzing collective data across the relevant models, providing insight into what new car buyers can expect.
Compact Luxury Sedans
- Audi A5 CR Predicted Reliability Score: 46/100
- Base MSRP:$50,200
- Mercedes-Benz C-Class CR Predicted Reliability Score: 59/100
- Base MSRP:$49,650
It may be a dwindling segment, but compact sedans are still a major battleground for the German luxury brands. Mercedes takes the lead here with its C-Class sedan, but it is worth noting that the A5 was launched just last year, and most new vehicles tend to experience a dip in reliability as the manufacturer refines the production process and rolls out a few minor updates and fixes.
A5 drivers frequently praise the car's sharp looks and driving dynamics but note that minor electronic glitches in the center console display can occasionally require a system reset. C-Class owners, meanwhile, had fewer complaints overall, and issues with the electronics and appreciated the high quality of the fit and finish.
Midsize Luxury Sedans
- Audi A6 CR Predicted Reliability Score: 42/100
- Base MSRP:$64,100
- Mercedes-Benz E-Class CR Predicted Reliability Score: 32/100
- Base MSRP: $63,900
Moving up to the midsize tier, the Audi A6 shows the Mercedes-Benz E-Class how it's done, although to be fair neither model performed particularly well here.. Owner feedback reveals that the current generation of the E-Class has been plagued by complex in-cabin software bugs, lagging screen responses, and occasional battery draw issues caused by the heavy load of its advanced tech features. While the Audi A6 is certainly not flawless, its mechanical powertrain components and infotainment system have had fewer issues overall.
Compact Luxury SUVs
- Audi Q5 CR Predicted Reliability Score: 40/100
- Base MSRP:$52,800
- Mercedes-Benz GLC CR Predicted Reliability Score: 37/100
- Base MSRP:$49,500
The compact SUV segment is a tight race for reliability, with the Audi Q5 squeezing past the Mercedes-Benz GLC by just 3 points. A good result here is important, as this is the most popular segment for both brands, and consumers will be closely comparing these scores when deciding on their next family vehicle.
Unfortunately, neither marque does well here, as these results are both at the lower end of the scale compared to their rivals. Owners of the Mercedes GLC have cited unexpected sensor faults and active driving assistance hiccups that trigger false warnings, while Audi Q5 owners also document occasional sensor issues, but they tend to occur less frequently. But both pale relative to rivals like the Porsche Macan (84/100) and the Lexus NX (71/100).
Midsize Luxury SUVs
- Audi Q7 CR Predicted Reliability Score: 45/100
- Base MSRP:$62,000
- Mercedes-Benz GLE CR Predicted Reliability Score: 41/100
- Base MSRP: $62,250
For larger family-sized luxury haulers, Audi takes another narrow win. The three-row Q7 achieves a 45/100 against the GLE's 41/100, but seeing as the current Q7 has been around since 2017, some common owner niggles should have been resolved by now. A brand new Q7 is waiting in the wings, and hopefully it will prove to be a more solid performer in the reliability stakes. The GLE has been around since 2020, and while it is still cutting-edge thanks to recent updates, owners haven't been particularly pleased with the rough shifts from the 9-speed automatic transmission and minor climate control system anomalies.
Electric Luxury SUVs
- Audi Q6 e-tron CR Predicted Reliability Score: 27/100
- Base MSRP:$64,500
- Mercedes-Benz EQE CR Predicted Reliability Score: 35/100
- Base MSRP: $64,950
Despite their comparative simplicity, according to Consumer Reports, electric vehicles have proven to less reliable than both gas and hybrid cars. This holds true for both Mercedes and Audi, where the EQE's lowly 35/100 score was enough o edge out the Q6 e-tron's 27/100.
Early adopters of the Q6 E-Tron heavily criticized charging port communication failures and thermal management errors that cause charging speeds to drop considerably. EQE owners also complain about infotainment system bugs, incorrect range predictions and other issues. The basic drivetrain and electric motors of both brands are solid, but there is a lot of room for refinement of the electrical systems and user interfaces.
Reliability Summary
| Vehicle Segment | Audi Predicted Score | Mercedes-Benz Predicted Score | Reliability Winner |
|---|---|---|---|
Compact Luxury Sedans | 46 | 59 | Mercedes-Benz C-Class |
Midsize Luxury Sedans | 42 | 32 | Audi A6 |
Compact Luxury SUVs | 40 | 37 | Audi Q5 |
Midsize Luxury SUVs | 45 | 41 | Audi Q7 |
Electric Luxury SUVs | 27 | 35 | Mercedes-Benz EQE |
Overall Score | 40.0 | 40.8 | Mercedes (just) |
While Audi wins three out of the five comparisons here, it does so with very small margins. Mercedes takes just two segment wins, but the C-Class sedan manages to push it ever so slightly ahead of the Audi overall.
In truth, there really is nothing in it, and neither manufacturer has managed to overcome the challenges of EVs or the complexity issues of their larger tech-packed models just yet.
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This story was originally published June 22, 2026 at 9:30 AM.