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Year Make/Model Repair Frequencysuccessful repair trips per 100 cars per year Compared to all models for the same year  
2015 Audi A5 / S5   12 A5 / S5s, 5.4 months of data per A5 / S5, average 4400 miles

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or 12 A5 / S5s, 5.4 months of data per A5 / S5, average 4400 miles

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2014 Audi A5 / S5 54 A5 / S5s, 8.6 months of data per A5 / S5, average 7700 miles10
0% 0% Fewest Trips Most Trips
see reported repairs
2014 Mercedes-Benz GLK-Class   15 GLK-Classes, 8.5 months of data per GLK-Class, average 9000 miles

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or 15 GLK-Classes, 8.5 months of data per GLK-Class, average 9000 miles

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2013 Audi A5 / S5 104 A5 / S5s, 9.4 months of data per A5 / S5, average 18700 miles

Refreshed for this model year.
6
0% 0% Fewest Trips Most Trips
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2012 Audi A5 31 A5s, 9.0 months of data per A5, average 35700 miles26
20% 20% Fewest Trips Most Trips
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2012 Audi S5 53 S5s, 9.4 months of data per S5, average 32200 miles55
60% 60% Fewest Trips Most Trips
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2011 Audi S5 51 S5s, 10.0 months of data per S5, average 44500 miles

Most of the cars in this sample are A4s or S4s.
45
40% 40% Fewest Trips Most Trips
see reported repairs
2011 Audi A5 42 A5s, 10.1 months of data per A5, average 45000 miles

Most of the cars in this sample are A4s or S4s.
48
50% 50% Fewest Trips Most Trips
see reported repairs
2011 Mercedes-Benz GLK-Class   17 GLK-Classes, 8.5 months of data per GLK-Class, average 33400 miles

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or 17 GLK-Classes, 8.5 months of data per GLK-Class, average 33400 miles

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2010 Audi A5 2.0T 36 A5 2.0Ts, 8.8 months of data per A5 2.0T, average 55100 miles

Most of the cars in this sample are A4s or S4s. Multiple reports of excessive oil consumption for the 2.0T engine. Some engines rebuilt with updated valves and piston rings.
27
10% 10% Fewest Trips Most Trips
see reported repairs
2010 Audi A5 3.2 / S5 55 A5 3.2 / S5s, 10.7 months of data per A5 3.2 / S5, average 53400 miles

Most of the cars in this sample are A4s or S4s. Multiple reports of excessive oil consumption for the 2.0T engine. Some engines rebuilt with updated valves and piston rings.
49
40% 40% Fewest Trips Most Trips
see reported repairs
2010 Mercedes-Benz GLK-Class   21 GLK-Classes, 9.6 months of data per GLK-Class, average 49200 miles

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or 21 GLK-Classes, 9.6 months of data per GLK-Class, average 49200 miles

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2009 Audi A5 / S5 37 A5 / S5s, 9.4 months of data per A5 / S5, average 57200 miles

Most of the cars in this sample are A4s. Multiple reports of excessive oil consumption for the 2.0T engine. Some engines rebuilt with updated valves and piston rings.
41
20% 20% Fewest Trips Most Trips
see reported repairs

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Mercedes-Benz GLK-Class vs. Audi A5 / S5 Reliability Comparisons

You won't find Mercedes-Benz GLK-Class or Audi A5 / S5 reliability information like this anywhere else. Actual repair frequencies, not just vague dots, to make it clear how much the Mercedes-Benz GLK-Class and the Audi A5 / S5 truly differ in reliability.

These stats are promptly updated four times a year, to much more closely track Mercedes-Benz GLK-Class and Audi A5 / S5 reliability as the cars age. Others tell you how reliable the Mercedes-Benz GLK-Class and the Audi A5 / S5 were a year ago, when the cars were a year younger and had 12,000 fewer miles on them. Only TrueDelta tells you how reliable the Mercedes-Benz GLK-Class and the Audi A5 / S5 have been recently.

What People Are Saying about Reliability and the Mercedes-Benz GLK-Class

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What Our Members Are Saying about the Reliability and Durability of the Mercedes-Benz GLK-Class

Mercedes-Benz GLK-Class Reliability and Durability: Pros
YearBody/PowertrainComment
2010 4dr SUV 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.
 

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

Audi A5 / S5 Reliability and Durability: Cons
YearBody/PowertrainComment
2010 2dr Coupe turbocharged 220hp 2.0L I4
6-speed manual AWD
Questionable Audi reliability.
2009 2dr Coupe turbocharged 177hp 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.
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.