mkaresh

We updated results for the W221 S-Class based on owner experiences through March 31, 2011. With a reported repair frequency of 83 repair trips per 100 cars per year, the 2007 is now about average.

This is based on a small sample size, so the result is not precise. The reported repair frequency has been decreasing as we receive data on more cars.

We'll have further updated in August and November. With more participants, we could provide more precise results and cover more model years.

For more detailed results, and to sign up to help improve this information:

Mercedes-Benz S-Class reliability ratings and comparisons

fbracer

Thank you for the stats.

mkaresh

We updated our car reliability stats for the Mercedes-Benz S-Class based on owner experiences through June 30, 2011. With a reported repair frequency of 86 repair trips per 100 cars per year, the 2007 remains about average.

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

For more detailed results, and to sign up to help improve this information:

Mercedes-Benz S-Class reliability ratings and comparisons

mkaresh

We've updated our reliability stats for the W221 S-Class based on owner experiences through September 30, 2011. With a reported repair frequency of 81 repair trips per 100 cars per year, the 2007 remains about average.

We'll have further updated later this month and in May. With the update we didn't have quite enough participants to provide a full result. With more participants, we could provide more precise results and cover more model years.

For more detailed our reliability stats, and to sign up to help improve this information:

Mercedes-Benz S-Class reliability ratings and comparisons

mkaresh

We have updated our reliability stats for the S-Class based on owner experiences through September 30, 2012.

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

2007: 67, about average, small sample size

We'll have further updates in February and May. We'd love to provide more precise stats and cover all model years--just a matter of getting more owners involved!

For the details, and to sign up to help:

Mercedes-Benz S-Class reliability ratings and comparisons

mkaresh

We have updated our reliability stats for the S-Class based on owner experiences through December 31, 2012.

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

2007: 46, low, small sample size so not precise

We'll have further updates in May and August. With more owners involved we could provide more precise stats and cover all model year.

For the details, and to sign up to help:

Mercedes-Benz S-Class reliability ratings and comparisons

mkaresh

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

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

2007 S-Class: 57, moderate, small sample size

We'll have further updates in August and in November.

For the details, including the descriptions of reported repairs, and to sign up to help improve this information:

Mercedes-Benz S-Class reliability ratings and comparisons

CityBoy

+1

balpo

Please put your data in. I have for my E class, but there needs to be S class data.

mkaresh

Thanks, guys!

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

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

2007 S-Class: 47, moderate, small sample size

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 S-Class reliability ratings and comparisons

mkaresh

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

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

2007 S-Class: 81, moderate, small sample size

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 S-Class reliability ratings and comparisons

mkaresh

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

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

2007 S-Class: 80, moderate, small sample size

We'll have further updates in May and in August. With more participants, we could cover more model years.

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

Mercedes-Benz S-Class reliability ratings and comparisons

mkaresh

Our reliability stats for the S-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:

2007 S-Class: 52, low, small sample size

Thank you, once again, everyone who has been helping. With more participants, we could provide full stats on all model years. 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 S-Class reliability ratings and comparisons

mkaresh

We've updated our reliability stats for the S-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:

2007 S-Class: 71, moderate, small sample size

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 S-Class reliability ratings and comparisons

mkaresh

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

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

2007 S-Class: 89, high, very small sample size

Variation over the last few quarters could easily be due to the sample size. Not enough owners signed up for other model years--though I'd love to cover them.

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 S-Class reliability ratings and comparisons

btesar

Since 2007 was the first year for the US, I would like to see the 2008-2013 stats as well. Looking only at the first year of a new model is not a very meaningful stat for reliability. Do you have the stats for the rest of the W221 years?

mkaresh

I wish we did. Not enough owners signed up to participate. Not really enough for the 2007, either, hence the sample size disclaimer. It's far harder to get enough participants for the S than for the C and E. Partly because they sell far fewer of the S.

mkaresh

We've updated our reliability stats for the S-Class to include owner experiences through the end of 2014. In terms of repair trips per 100 cars per year:

2007 S-Class: 67, moderate, very small sample size

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

Mercedes-Benz S-Class reliability ratings and comparisons

mkaresh

Our reliability stats for the S-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):

2007 S-Class: 60, moderate, very small sample size

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 S-Class reliability

mkaresh

Our reliability stats for the S-Class now cover the year ending June 30, 2015. Unfortunately, as in the past we only have a rough stat for the 2007. In terms of repair trips per 100 cars:

2007 S-Class: 36, low, very small sample size

This stat seems too good to be accurate, so it's likely an effect of the small sample size.

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

Mercedes-Benz S-Class reliability ratings and comparisons

mkaresh

We've updated our reliability stats for the S-Class to include owner experiences through September 30, 2015. Once again we only have a stat for the 2007. It's a low 39 repair trips per 100 cars, good for a 2007, but based on a very small sample size.

For the details, including repair descriptions, and to sign up to help improve this information:

Mercedes-Benz S-Class reliability ratings and comparisons

mkaresh

We've updated our reliability stats for the S-Class to include owner experiences through the end of 2015, about eight months ahead of other sources. In terms of repair trips per 100 cars per year--lower is better:

2007 S-Class: 39, low, very small sample size

For the repairs behind these stats, reliability information on other models, and to sign up to help improve this information:

Mercedes-Benz S-Class reliability ratings and comparisons

mercedesbenzs55

May we have the number of reporting owners? Low could be 10000, compared to overall quantity of owners.

DaveW68

He mentions it in the post....39 since they started counting records.

mkaresh

10,000 would be an extremely large sample size, far larger than anyone save Mercedes (through warranty claims) has ever had for the 2007 S-Class, and far larger than is necessary unless you're studying rare problems.

We mark a sample size small if under 25, and very small if between 10 and 15. I post nothing at all under ten. We can provide usefully precise stats with 25 responses, but only a broad indicator at best at the current levels. The key thing to realize is that we've put a process in place to yield better, more up-to-date information than anything else out there. If enough owners participate, as they do for many other models, we'll have the information.