mkaresh

Updated results again next month. The more owners participate, the better the information we can provide. Especially need more 2009s and 2010s.

Car reliability research

mkaresh

Updated results later this month.

We're going to start providing new stats for the odds of requiring no repairs and the odds of getting a lemon. These require larger sample sizes, so additional participants would be helpful. Especially need 2009s and 2010s.

For the details, and to sign up:

Car reliability research

mkaresh

We have updated results for the W204 C-Class to include owner experiences through September 30, 2009. In terms of repair trips per 100 cars per year:

2009: 45, about average, small sample size

2008: 40, better than average

We've also introduced, two new 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.

In the case of the 2008 C-Class, the percentage with no repairs is about 69, and the percentage of lemons is about 3.

Nada-odds and Lemon-odds car reliability stats

Everyone who has been helping, thank you, once again. We'll have further updates in February and May. With more participants, we could provide more precise information and cover all model years. Especially need more 2009s and (once they're available) 2010s.

Mercedes-Benz C-Class reliability comparisons

mkaresh

130 C204 owners now signed up. An excellent start, but more are needed to provide precise results for all model years. Especially need more 2009s and 2010s.

Not yet signed up? Details here:

Car reliability research

Updated results next month.

mkaresh

We have updated results for the W204 C-Class to include owner experiences through December 31, 2009. In terms of repair trips per 100 cars per year:

2009: 50, about average, small sample size

2008: 27, better than average

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.

In the case of the 2008 C-Class, the percentage with no repairs is about 71, and the percentage of lemons is about 3.

Nada-odds and Lemon-odds car reliability stats

Everyone who has been helping, thank you, once again. We'll have further updates in May and August. With more participants, we could provide more precise information and cover all model years. Especially need more 2009s and 2010s.

Mercedes-Benz C-Class reliability comparisons

mr inkredibul

wtf is a c204?

mkaresh

It's what happens when you think "W204 C-Class" real quick, and don't have a way to edit later.

mr inkredibul

Just teasing....

mkaresh

Which is what happens when someone can't want to get theirs, but in the meantime must enjoy the C vicariously through the forums

mr inkredibul

Touche...I have to wait a whole month.

mkaresh

Just enhanced the related repair history survey so that it can (optionally) be used as a personal car maintenance record.

As always, more participants would be helpful. Especially need more 2009s and 2010s.

Updated Car Reliability Survey results in May, with a preview for participants in mid-April.

Car reliability research

mkaresh

Updated stats in about two weeks.

Especially need more participants for the 2009 and 2010.

Not yet signed up? Details here:

Car reliability research

mkaresh

We have updated results for the W204 C-Class to include owner experiences through March 31, 2010. In terms of repair trips per 100 cars per year:

2009: 44, about average

2008: 32, better than average

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.

In the case of the 2008 C-Class, the percentage with no repairs is about 73, and the percentage of lemons is about 3.

Nada-odds and Lemon-odds car reliability stats

Everyone who has been helping, thank you, once again. We'll have further updates in August and November. With more participants, we could provide more precise information and cover all model years.

Mercedes-Benz C-Class reliability comparisons

mkaresh

514 owners now signed up for the C-Class, including 160 for the W204. A good start, but more remain needed to fully cover all model years.

To sign up:

Car reliability research

mkaresh

We have updated results for the C-Class to include owner experiences through June 30, 2010.

Other sources of car reliability information won't cover the more recent months until the summer or even fall of next year.

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

2009: 44, about average

2008: 28, better than average

Thank you, once again, to everyone who has been helping. We'll have further updates in November and February. With more participants, we could provide more precise information and cover all model years.

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

Mercedes-Benz C-Class reliability comparisons

mkaresh

In a few days we'll start previewing the next set of results to participants. The preview results will be updated as responses come in.

As always, the more owners participate, the better the information we can provide to everyone.

Car reliability research

mkaresh

Starting this month we have a new question to measure, as objectively as possible, the severity of a problem. Many people have been asking for reliability stats that weight problems by how severe they are, and once we have enough responses with the revised survey we'll start providing this.

Also this month: updated reliability stats.

mkaresh

We have updated results for the C-Class to include owner experiences through September 30, 2010. Other sources of car reliability information won't cover the months since April until the summer or even fall of next year.

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

2010: 14, better than average, small sample size

2009: 46, about average

2008: 32, better than average

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.

With the 2008 the percentage with no repairs is about 80, while the percentage with 3+ repair trips is about 3.

Mercedes-Benz C-Class Lemon-odds and Nada-odds

Thank you, once again, to everyone who has been helping. We'll have further updates in February and May. With more participants, we could provide more precise information and cover all model years.

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

Mercedes-Benz C-Class reliability ratings and comparisons

mkaresh

We have updated results for the C-Class to include owner experiences through December 31, 2010. Other sources of car reliability information won't cover the months since April until the summer or even fall of this year.

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

2010: 29, better than average, small sample size

2009: 40, better than average

2008: 47, about average

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.

With the 2008 the percentage with no repairs is about 77, while the percentage with 3+ repair trips is about 3.

Mercedes-Benz C-Class Lemon-odds and Nada-odds

Thank you, once again, to everyone who has been helping. We'll have further updates in May and August. With more participants, we could provide more precise information and cover all model years.

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

Mercedes-Benz C-Class reliability ratings and comparisons

Acapulco Bill

Lets all help Michael Karesh in this quest. Sign up and update your stats every three months (only if there has been a non-service repair). Surveys will come via email every 3 months, if nothing outside standard maintenance has been done, either no reply is needed, or only a mileage update is required.

Needed are more 2010 W204 owners, the sample size is statistically too small to be a significant sample. Help with this important independent survey to get the truth about MB quality and reliability.

mkaresh

Thanks, Bill, I appreciate this.

To clarify the system:

1. Emails with links to the survey go out each month, in case there has been a repair. I've found that people find it much harder to report a repair off the top of their head if more than a few weeks have passed.

2. If no repair, all that is needed is an approximate odometer reading following the end of each quarter. This takes most people about 30 seconds. Reporting a repair takes a couple of minutes. The typical newish car requires one repair every two years.

mkaresh

We have updated our car reliability stats for the W204 C-Class to include owner experiences through March 31, 2011.

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

2010: 52, about average, small sample size

2009: 48, about average

2008: 53, about average

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.

With the 2008 the percentage with no repairs is about 75, while the percentage with 3+ repair trips is about 3.

Mercedes-Benz C-Class Lemon-odds and Nada-odds

We'll have further updates in August and November. With more participants, we could provide more precise information and fully cover all model years.

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

Mercedes-Benz C-Class reliability ratings and comparisons

redfox302

Just signed up. Thanks.

mkaresh

We have updated our car reliability stats for the W204 C-Class to include owner experiences through June 30, 2011.

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

2010: 63, about average, small sample size

2009: 47, about average

2008: 61, about average

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.

With the 2008 the percentage with no repairs is about 64, while the percentage with 3+ repair trips is about 3.

Mercedes-Benz C-Class Lemon-odds and Nada-odds

We'll have further updates in November and February. With more participants, we could provide more precise information and cover all model years.

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

Mercedes-Benz C-Class reliability ratings and comparisons

mkaresh

We have updated our reliability stats for the C-Class (on our redesigned site) to include owner experiences through September 30, 2011.

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

2010: 62, about average

2009: 46, about average

2008: 58, about average

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.

With the 2008 the percentage with no repairs is about 58, while the percentage with 3+ repair trips is about 3.

Mercedes-Benz C-Class Lemon-odds and Nada-odds

Thank you, once again, to everyone who has been helping. We'll have further updates later this month and in May. With more participants, we could provide more precise information and cover all model years.

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

Mercedes-Benz C-Class reliability ratings and comparisons