We've updated our reliability stats for the C-Class to include owner experiences through June 30, 2013. (Another source is about 14 months behind.)

Repair frequencies, in terms of repair trips per 100 cars per year:

2012 C-Class: 14, low
2010 C-Class: 51, moderate
2009 C-Class: 52, moderate
2008 C-Class: 39, low
2007 C-Class: 47, moderate, small sample size
2006 C-Class: 43, low, small sample size
2005 C-Class: 57, moderate, small sample size
2004 C-Class: 69, moderate, very small sample size
2003 C-Class: 59, low, small sample size
2002 C-Class: 89, moderate, small sample size

We have two additional statistics, "Nada-odds" and "Lemon-odds", to indicate the percentage of cars with no repairs in the past year and those that required 3+ trips to the repair shop:

2012 C-Class: 92, < 1
2008 C-Class: 71, 7

We'll have further updates in November and February.

To view competitors' scores and descriptions of reported repairs, and to sign up to help:

Mercedes-Benz C-Class reliability ratings and comparisons

 

We've updated our reliability stats for the C-Class to include owner experiences through September 30, 2013.

Repair frequencies, in terms of repair trips per 100 cars per year:

2013 C-Class: 14, low, very small sample size
2012 C-Class: 14, low
2011 C-Class: 56, moderate, small sample size
2010 C-Class: 53, moderate
2009 C-Class: 37, low
2008 C-Class: 35, low
2007 C-Class: 60, moderate, small sample size
2006 C-Class: 36, low, small sample size
2005 C-Class: 40, low, small sample size
2004 C-Class: 66, low, very small sample size
2003 C-Class: 50, low, small sample size
2002 C-Class: 89, moderate, small sample size

We have two additional statistics, "Nada-odds" and "Lemon-odds", to indicate the percentage of cars with no repairs in the past year and those that required 3+ trips to the repair shop:

2012 C-Class: 92, < 1
2008 C-Class: 69, < 1

We'll have further updates in February and in May. The more owners participate, the more comprehensive and precise these will be.

To see how competitors compare, and to sign up to help improve this information:

Mercedes-Benz C-Class reliability ratings and comparisons

 

We've updated our reliability stats for the C-Class to include owner experiences through December 31, 2013.

Repair frequencies, in terms of repair trips per 100 cars per year:

2013 C-Class: 20, low, small sample size
2012 C-Class: 8, low
2011 C-Class: 39, moderate, small sample size
2010 C-Class: 56, moderate
2009 C-Class: 36, low
2008 C-Class: 38, low
2007 C-Class: 61, moderate, small sample size
2006 C-Class: 39, low, small sample size
2005 C-Class: 11, low, very small sample size
2004 C-Class: 99, high, very small sample size
2003 C-Class: 56, low, very small sample size
2002 C-Class: 44, low, very small sample size

We have two additional statistics, "Nada-odds" and "Lemon-odds", to indicate the percentage of cars with no repairs in the past year and those that required 3+ trips to the repair shop:

2008 C-Class: 68, < 1

We'll have further updates in May and in August. The more owners participate, the more comprehensive and precise these will be.

To see the repairs behind these stats, and to sign up to help improve this information:

Mercedes-Benz C-Class reliability ratings and comparisons

 

Our reliability stats for the C-Class now include owner experiences through March 31, 2014, making them nearly a year ahead of other sources.

Repair frequencies, in terms of repair trips per 100 cars per year:

2013 C-Class: 22, low, small sample size
2012 C-Class: 12, low
2011 C-Class: 63, moderate, small sample size
2010 C-Class: 66, moderate
2009 C-Class: 36, low
2008 C-Class: 35, low
2007 C-Class: 47, low, small sample size
2006 C-Class: 50, low, small sample size
2005 C-Class: 18, low, small sample size
2003 C-Class: 108, moderate, very small sample size
2002 C-Class: 88, moderate, very small sample size
2001 C-Class: 47, low, very small sample size

We have two additional statistics, "Nada-odds" and "Lemon-odds", to indicate the percentage of cars with no repairs in the past year and those that required 3+ trips to the repair shop:

2009 C-Class: 73, < 1
2008 C-Class: 68, < 1

Thank you, once again, everyone who has been helping. Next update in August.

For a deeper dive, including the stats for other cars and repair descriptions, and to sign up to help improve this information:

Mercedes-Benz C-Class reliability ratings and comparisons

 

We've updated our reliability stats for the C-Class to include owner experiences through June 30, 2014 (making them about 14 months ahead of some others).

Repair frequencies, in terms of repair trips per 100 cars per year:

2013 C-Class: 36, moderate
2012 C-Class: 9, low
2011 C-Class: 44, moderate, small sample size
2010 C-Class: 64, moderate
2009 C-Class: 39, low
2008 C-Class: 39, low
2007 C-Class: 42, low, small sample size
2006 C-Class: 57, moderate, small sample size
2005 C-Class: 51, low, small sample size
2003 C-Class: 89, moderate, very small sample size
2002 C-Class: 98, moderate, small sample size
2001 C-Class: 54, low, very small sample size

We have two additional statistics, "Nada-odds" and "Lemon-odds", to indicate the percentage of cars with no repairs in the past year and those that required 3+ trips to the repair shop:

2009 C-Class: 67, < 1
2008 C-Class: 64, < 1

Next updates in November and in February. The more owners participate, the more comprehensive and precise these will be.

For repair descriptions, the stats of other cars, and to sign up to help improve this information:

Mercedes-Benz C-Class reliability ratings and comparisons

 

We've updated our reliability stats for the C-Class to include owner experiences through September 30, 2014.

Repair frequencies, in terms of repair trips per 100 cars per year:

2013 C-Class: 31, moderate
2012 C-Class: 13, low
2011 C-Class: 59, moderate, small sample size
2010 C-Class: 62, moderate
2009 C-Class: 38, low
2008 C-Class: 40, low
2007 C-Class: 16, low, small sample size
2006 C-Class: 48, low, small sample size
2005 C-Class: 64, moderate, small sample size
2004 C-Class: 113, high, very small sample size
2003 C-Class: 77, moderate, very small sample size
2002 C-Class: 103, moderate, small sample size
2001 C-Class: 58, low, very small sample size

We have two additional statistics, "Nada-odds" and "Lemon-odds", to indicate the percentage of cars with no repairs in the past year and those that required 3+ trips to the repair shop:

2008 C-Class: 69, < 1

Additional participants always helpful (especially if you see "small sample size" next to the year, or no stat at all).

To view the repairs behind these numbers, check the stats for other cars, and sign up to help improve this information (next update in February):

Mercedes-Benz C-Class reliability ratings and comparisons

 

We've updated our reliability stats for the C-Class to include owner experiences through the end of 2014.

Repair frequencies, in terms of repair trips per 100 cars per year:

2013 C-Class: 25, low
2012 C-Class: 12, low
2011 C-Class: 43, moderate, small sample size
2010 C-Class: 66, moderate
2009 C-Class: 54, moderate
2008 C-Class: 48, low
2007 C-Class: 8, low, small sample size
2006 C-Class: 52, low, small sample size
2005 C-Class: 84, moderate, small sample size
2004 C-Class: 68, low, very small sample size
2003 C-Class: 74, low, very small sample size
2002 C-Class: 110, moderate, small sample size
2001 C-Class: 65, low, very small sample size

We have two additional statistics, "Nada-odds" and "Lemon-odds", to indicate the percentage of cars with no repairs in the past year and those that required 3+ trips to the repair shop:

2008 C-Class: 54, < 1

We'll have further updates in May and in August. We especially need more participants for years with sample size notes...or that we don't have any stats for.

For the details, including how competitors compare, and to sign up to help improve this information:

Mercedes-Benz C-Class reliability ratings and comparisons

 

So, how have these cars been doing lately?

Our reliability stats for the C-Class now include owner experiences through March 31, 2015. (Others are nearly a year behind.)

In terms of repair trips per 100 cars per year ("low" is best):

2013 C-Class: 19, low
2012 C-Class: 24, low
2011 C-Class: 21, low, small sample size
2010 C-Class: 47, moderate
2009 C-Class: 60, moderate
2008 C-Class: 53, moderate
2007 C-Class: 16, low, small sample size
2006 C-Class: 44, low, small sample size
2005 C-Class: 95, moderate, small sample size
2004 C-Class: 59, low, very small sample size
2003 C-Class: 55, low, very small sample size
2002 C-Class: 79, low, small sample size
2001 C-Class: 65, low, very small sample size

Plus, the percentage of cars with no repairs in the past year and those that required 3+ trips to the repair shop:

2013 C-Class: 87, < 1
2012 C-Class: 79, < 1
2008 C-Class: 55, < 1

No stat for a model year? Then we very much need more participants for it. Same for those with small sample size notes. Next updates in August and November.

For repair descriptions, the stats for other cars, and to sign up to help improve this information:

Mercedes-Benz C-Class reliability

 

Our reliability stats for the C-Class now cover the year ending June 30, 2015. (Others are over a year behind, and so report how these cars were doing when a year younger.)

Repair trips per 100 cars:

2015 C-Class: 73, high, small sample size
2013 C-Class: 8, low
2012 C-Class: 26, low
2011 C-Class: 16, low, small sample size
2010 C-Class: 44, low
2009 C-Class: 52, moderate
2008 C-Class: 56, moderate
2007 C-Class: 29, low, very small sample size
2006 C-Class: 38, low, small sample size
2005 C-Class: 67, low, small sample size
2004 C-Class: 53, low, very small sample size
2003 C-Class: 53, low, very small sample size
2002 C-Class: 66, low, small sample size
2001 C-Class: 67, low, very small sample size

We have two additional statistics, "Nada-odds" and "Lemon-odds", to indicate the percentage of cars with no repairs in the past year and those that required 3+ trips to the repair shop:

2013 C-Class: 96, < 1
2012 C-Class: 75, < 1

If a model year isn't listed, or its sample size is small, then we especially need more owners involved.

For the descriptions of all reported repairs, results for other models, and to sign up to help improve this information:

Mercedes-Benz C-Class reliability ratings and comparisons

 

Thank you for your extensive stats for the C-class, MK. One thing I'm curious and would like to see is to separate the C-class into different engine sizes and poll what are the most frequent repairs and at what average mileage. This could prevent any unseen issues that could be repaired before they happen.
Case in point my car is a 2005 C230 auto with 113,000 miles. I was driving down the highway in the fast lane with no shoulder on the left and suddenly my engine quit, I knew right away it was my fuel pump. It was quite scary to sit and wait 30 minutes with cars whizzing by at 80+ MPH for the CHP to come and rescue me by pushing my car to the right shoulder. Had I known this is something that would give out I would have changed it at 100k as a preventative maintenance item.
At 80k I changed the auto trans pilot bushing I got from Amazon, I just had to change it again at 112k but this time I got the part from the dealer and found out that Mercedes has actually upgraded the part as they already know of this issue, the part was only $26 and I could feel that the o-rings were made of better quality than the one I got from Amazon (for $33!). The only other things I had done was motor mounts at around 90k and a spray alternator pulley at 60k. The car has been quite reliable otherwise.

Thank you.