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Mercedes-Benz GLK vs. Audi A5 / S5 Reliability by Model Generation

Results are for year ending September 30, 2016. Only successfully completed repairs are currently included in the analysis. Routine maintenance, most wear items, recalls, and problems fixed with just a reflash or warning light reset are not included.
Year and Model Percent of Average  
2012 - 2016 Audi A5 / S5
34% Best 97% Worst
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2010 - 2015 Mercedes-Benz GLK
22.5714285714% Best 77% Worst
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2008 - 2011 Audi A5 / S5
51.1428571429% Best 127% Worst
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What Our Members Are Saying about the Reliability And Durability of the Mercedes-Benz

Mercedes-Benz Reliability And Durability: Pros
2010 4dr SUV 268-horsepower 3.5L V6
7-speed shiftable automatic AWD
Our previous vehicle was a 2005 Mercedes Benz C-240. From a reliability standpoint, the C-240 was flawless. I am hoping the GLK will be as good as the C-240 was. full 2010 Mercedes-Benz review

What Our Members Are Saying about the Reliability And Durability of the Audi A5 / S5

Audi A5 / S5 Reliability And Durability: Cons
2010 2dr Coupe turbocharged 211hp 2.0L I4
6-speed manual AWD
Questionable Audi reliability. full 2010 Audi A5 / S5 review
2009 2dr Coupe turbocharged 170hp 2.0L I4 Diesel
6-speed manual AWD
Reliability is questionable. Engine has already stopped on idle rpm once right after a start-up, oil level was temporarily unavailable on display, one of the headlights is no longer waterproof (moist inside). Odometer is currently only 4000 miles. full 2009 Audi A5 / S5 review
2008 2dr Coupe 354-horsepower 4.2L V8
6-speed manual AWD
I have had this car repaired over 10 times. Clutch (multiple times), door electronics, dealer incompetence, Catalytic converter, misfires, power window issues, A/C freezing issues all before 45k miles. full 2008 Audi A5 / S5 review