The short answer
Based on available data, the Mercedes-Benz C-class comes out ahead of the Acura TL 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.
Overall
Owner sentiment is sharply divided by transmission choice rather than by the car itself. The 3rd generation TL (2004-2008) draws heavy criticism for its automatic transmission, which owners repeatedly describe as failure-prone, while the same car with the 6-speed manual is widely praised as durable and fun. The 4th generation (2009-2014), especially the SH-AWD with the 3.7L V6 and 6-speed manual, is regarded as one of the best sport sedans Acura built, with owners citing the combination of a naturally aspirated V6, torque-vectoring all-wheel drive, four doors, and a manual as something no longer made.
Best version to buy
The 2007-2008 3rd generation TL and the 4th generation TL (2009-2014), particularly the SH-AWD with the 6-speed manual, are the versions owners most often endorse. The 2007-2008 cars are singled out for receiving a revised, beefier automatic transmission, and the 4th generation SH-AWD 6MT is called by multiple owners arguably the best sport sedan Acura ever made.
Known issues
Overall
\nSentiment is mixed and highly dependent on generation, model year, and comparison context. For the W205 generation (approx. 2015-2021), feedback is generally positive, describing it as a comfortable, refined, and well-built daily driver that feels satisfyingly competent and smooth in normal conditions. It is frequently praised for offering a good value proposition in the luxury sedan segment.
Best version to buy
\nFor the W205 generation, the diesel models (e.g., 220d) are highlighted for their reliability and fuel economy, with the 2.1L diesel specifically noted for being "pretty much unkillable." The C300 with 4MATIC is also frequently recommended for its balance of power and all-weather capability. There is a strong recommendation to seek models equipped with conventional tires over run-flats for improved ride comfort.
Known issues
The verdict
The Mercedes-Benz C-class is the better choice for most buyers.
It has more power on its best-equipped version than the Acura TL, based on the data above. If efficiency matters more to you than outright power, the Acura TL is worth a closer look instead.
Common problems by model year
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Owner reports show similar reliability sentiment for the Acura TL and the Mercedes-Benz C-class. Check the known issues listed above for specific differences between the two.
Both seat a similar number of passengers based on our data. The Acura TL is classed as a Sedan, the Mercedes-Benz C-class as a Station wagon, which affects cargo space and ride height for family use.
The EPA rates the 2014 Acura TL at 20–23 mpg combined and the 2027 Mercedes-Benz C-class at 27–29 mpg, depending on the version.
Exact maintenance costs aren't in our data, but owner reports mention cost-related concerns more often for the Mercedes-Benz C-class than the Acura TL. See the known issues comparison above.