2012 Mercedes Benz E550: what breaks, and at what mileage
What breaks on the 2012 Mercedes Benz E550
On the 2012 Mercedes Benz E550, the failure owners report most often is airbag inflator rupture, with 7 reports on file. Across every failure mode on this year, half the dated reports were filed before 70,000 miles. Overall it scores 71 out of 100, high risk for a 2012.
High risk for a 2012 — 141st riskiest of the 271 2012 vehicles we can rate. 22 owner reports; fleet size estimated from this year's own recall paperwork.
What breaks on the 2012 Mercedes Benz E550
Owners have reported 9 named failure modes on the 2012 Mercedes Benz E550, and the three most-reported carry 50% of everything filed.
Airbag inflator rupture leads with 7 reports and about 1.7 per 1,000 vehicles.
No-start or intermittent start failure follows with 2 reports.
Ignition switch, key fob or immobilizer failure follows with 2 reports, median 70,000 miles.
By system, the reports fall mostly into airbag (9), electrical (3) and engine (2).
At what mileage it happens
11 of the reports on the 2012 Mercedes Benz E550 came with an odometer reading, and half of those were filed before 70,000 miles.
Cumulatively, 45% by 50,000 miles and 73% by 100,000 miles of the dated reports had been filed.
The busiest stretch is between 110,000 and 120,000 miles, which alone holds 27% of the dated reports.
36% of the dated reports were filed below 36,000 miles, which is early enough that a fair number of these cars were still under a factory warranty when the owner complained.
Tick median reported mileage Solid middle half of reports Faint 10th to 90th percentile Colour how bad the failure is when it happens
How reports accumulate
Every report with an odometer reading, cumulative, from 0 to 200,000 miles. A curve that climbs early is a car with early problems, whatever its total.
- Line share of reports filed by that mileage
- Dashed the median reported mileage
Severity, and what it costs
Across the named modes, 1 mentions a crash and 1 an injury. Those are the words owners used in their own complaints, and NHTSA does not verify them, but they are the closest thing in this data to a measure of what a failure actually did.
The average severity weight across every report on this year is 5.18, where a stalled engine or a failed airbag weighs many times more than a rattling trim panel, and a figure this high means the reports are dominated by failures with safety consequences rather than annoyances. The weighting is set out in full on the methodology page.
What the top failures cost to put right, as editorial estimates for an independent US shop rather than figures from NHTSA: airbag inflator rupture at $0–$0, no-start or intermittent start failure at $200–$1,800, ignition switch, key fob or immobilizer failure at $250–$1,500 and seat belt or retractor failure at $200–$900. Dealer labour, a seized bolt or a part that is no longer made can push any of these past the top of its range.
9% of the reports on this year sit in the engine, transmission, drivetrain or cooling systems — the four where a repair bill is usually four figures.
Every reported failure mode
| Failure mode | System | Reports | With reading | 25th | Median | 75th | Per 1,000 | Typical repair | Severity |
|---|---|---|---|---|---|---|---|---|---|
| Airbag inflator rupture | airbag | 7 | 1 | — | 19k | — | 1.7 | $0–$0 | Critical |
| No-start or intermittent start failure | engine | 2 | 0 | — | — | — | 0.5 | $200–$1,800 | Moderate |
| Ignition switch, key fob or immobilizer failure | electrical | 2 | 2 | — | 69k | — | 0.5 | $250–$1,500 | High |
| Seat belt or retractor failure | airbag | 2 | 2 | — | 26k | — | 0.5 | $200–$900 | High |
| Air suspension failure | suspension | 2 | 2 | — | 110k | — | 0.5 | $900–$4,500 | High |
| Other steering problem | steering | 2 | 1 | — | 113k | — | 0.5 | $350–$2,400 | High |
| Fuel leak or fuel odor | fuel | 1 | 1 | — | 80k | — | 0.3 | $300–$2,500 | Critical |
| Other electrical problem | electrical | 1 | 0 | — | — | — | 0.3 | $250–$2,000 | Moderate |
| Other brake problem | brakes | 1 | 0 | — | — | — | 0.3 | $300–$1,800 | High |
| Unclassified problem | other | 2 | 2 | — | 18k | — | 0.5 | — | Moderate |
Rate per 1,000 uses a fleet-size estimate derived from recall paperwork for this exact model year. It is a lower bound. Repair costs are typical independent-shop ranges for the failure, not figures from these reports.
How often, against how many were built
Scaled by an estimate of how many of these cars exist, the 2012 Mercedes Benz E550 draws about 5.5 per 1,000 vehicles, which puts it in the 86th percentile of complaint rates among 2012 vehicles we can rate.
That denominator is the weakest number on the page and it is fair to say so plainly. Rate per 1,000 uses a fleet-size estimate derived from recall paperwork for this exact model year. It is a lower bound.
The working figure is 4,004 vehicles. If the true number is twice that, every rate on this page is half what it says; the ranking against other 2012 vehicles, which is what the risk score uses, is far more robust than the rate itself.
What owners wrote
Verbatim from NHTSA complaint narratives, trimmed for length. The odometer reading is the one the owner gave.
Airbag inflator rupture
Takata recall I have received a recall notice jan 2017 still no date on parts and repair the can not be re sold by a mercedes dealer with open recall car has lost approx 10,000 dollar in value or this issue. Just spoke with local dealer no update could be months or years was there update.
Recalls on the 2012 model year
NHTSA has issued 4 recall campaigns covering the 2012 Mercedes Benz E550, affecting an estimated 9,950 vehicles. A recall is a different kind of evidence from a complaint: it is the regulator and the manufacturer agreeing that something has to be fixed, and the fix is free for as long as the car exists.
The campaigns cover air bags:frontal:passenger side:inflator module, air bags:frontal and air bags:side/window. Whether the work was actually done on the car in front of you is a question only the VIN can answer, and the manufacturer or NHTSA will answer it free.
One caution about reading these together: a recall usually raises the complaint count for the same part, because owners who read about it go and file. The mileages stay informative; the counts get noisy.
AIR BAGS:FRONTAL:PASSENGER SIDE:INFLATOR MODULE
288,779 vehicles 2019-01-09- Defect
- Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2014 C250, C300 4Matic, C350, C63 AMG, E350 4Matic Coupe, E350 Cabrio, E350 Coupe, SLS AMG Cabrio, SLS AMG Coupe, 2014-2015 C250 Coupe, C350 4Matic Coupe, C350 Coupe, C63 AMG Coupe, GLK 350, GLK250 BlueTec 4Matic, GLK350 RWD, 2015-2017 E400 4Matic Coupe, E400 Cabrio, E400 Coupe, 2014-2017 E550 Cabrio, and 2014-2016 E550 Coupe vehicles sold, or ever registered, in the states of AL, CA, FL, GA, HI, LA, MS, SC, TX, PR, AS, GU, the MP, and VI or "Zone A." Additionally, MBUSA is recalling certain 2012-2014 C250, E350 4Matic…
- Consequence
- An inflator explosion may result in sharp metal fragments striking the passenger or other occupants resulting in serious injury or death.
- Remedy
- MBUSA will notify owners, and dealers will replace the passenger frontal air bag module, free of charge. The recall began March 29, 2019. Owners may contact MBUSA customer service at 1-800-367-6372.
AIR BAGS:FRONTAL
495,290 vehicles 2017-10-06- Defect
- Mercedes-Benz USA, LLC. (MBUSA) is recalling these vehicles: 2014-2018 CLA250, CLA250 4Matic, CLA45 AMG 4Matic, 2015-2018 GLA250, GLA250 4Matic, GLA45 AMG 4Matic, C300 4Matic, C63S AMG, 2012-2014 C250, C350, C300 4Matic, E550 4Matic, 2013-2014 C63 AMG, 2012-2015 C250 Coupe, C350 Coupe, C63 AMG Coupe, 2013-2015 C350 4Matic Coupe, GLK250 4Matic BlueTec, GLK350, GLK350 4Matic, 2016-2017 C350e, C43 AMG, 2015 C400 4Matic, 2016-2018 C63 AMG, GLC300, GLC300 4Matic, 2017-2018 C300 Coupe, C300 4Matic Coupe, C43 AMG, C63 AMG Coupe, C63S AMG Coupe, C300 Cabriolet, C300 4Matic…
- Consequence
- If the driver air bag inadvertently deploys, it can increase the risk of injury and a crash.
- Remedy
- MBUSA will notify owners, and dealers will add sufficient grounding to the steering components, free of charge. The recall began in December 6, 2017. Owners may contact MBUSA customer service at 1-877-496-3691.
AIR BAGS:FRONTAL:PASSENGER SIDE:INFLATOR MODULE
104,119 vehicles 2017-01-10- Defect
- Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2012 C300 4Matic, C250, C250 Coupe, C350, C350 Coupe 4Matic, C350 Coupe, C63 AMG, C63 AMG Coupe, E350 Coupe 4Matic, E350 Cabrio, E350 Coupe, E550 Cabrio, E550 Coupe, GLK350 4Matic, GLK350, SLS AMG Cabrio, and SLS AMG Coupe vehicles originally sold, or ever registered, in Alabama, California, Florida, Georgia, Hawaii, Louisiana, Mississippi, South Carolina, Texas, Puerto Rico, American Samoa, Guam, the Northern Mariana Islands (Saipan), and the U.S. Virgin Islands, or "Zone A." Additionally, unless included in "Zone A"…
- Consequence
- An inflator rupture may result in metal fragments striking the vehicle occupants resulting in serious injury or death.
- Remedy
- MBUSA will notify owners, and dealers will replace the front passenger air bag modules, free of charge. Owners were sent an interim notification in March 2017. Second notices started going out in October 2018 and continue to be mailed as parts become available. Owners may contact MBUSA customer service at 1-877-496-3691
AIR BAGS:SIDE/WINDOW
499 vehicles 2012-10-09- Defect
- Mercedes-Benz is recalling certain model year 2012 E350 and E550 Coupe vehicles, manufactured April 2, 2012, through June 29, 2012. Improper stitching of the right side window curtain air bag may cause it to not deploy as intended in the affected vehicles.
- Consequence
- In the event of an accident necessitating the deployment of the right window curtain air bag, the improper stitching may cause it to deflate more quickly than intended, reducing the protection it may provide, resulting in an increased risk of injury to vehicle occupants.
- Remedy
- Mercedes-Benz will notify owners, and dealers will replace the right side window curtain air bag. The recall began on December 21, 2012. Owners may contact Mercedes-Benz at 1-800-367-6372.
Recall work is free at a franchised dealer regardless of the car's age. Check the VIN at nhtsa.gov/recalls before assuming it was done.
How it ranks in the 2012 field
The score at the top of the page, placed among its peers. The zones are the same thresholds the scorer applies, read out of the scorer itself, so the picture and the band word cannot disagree.
Scores are ranked within the model year, never across years, because an older car has had longer to accumulate reports.
- Left fewer and less serious reports
- Right more, or worse
- Marker this vehicle
Better and worse years of the same car
High risk for a 2012 — 141st riskiest of the 271 2012 vehicles we can rate. Because the ranking is against the same model year only, age cancels out of it.
Across the 7 model years of this car that carry enough reports to score, 2008 comes out best at 64 and 2013 worst at 73, with 2012 itself at 71.
If the model year is negotiable, 2008, 2007, 2014 and 2010 score lower than 2012 by a margin worth acting on. Same body, same engines, different luck — usually a supplier change or a mid-cycle fix, which the complaint data can show but never explain.
Within the 2010–2017 generation specifically, 2014 is the strongest year at 66 and 2013 the weakest at 73.
Scores compare each year against other cars of the same model year, so a low number on an older car is a real result and not an artefact of age.
Shorter is better. Years with too few reports to score are shown without a bar rather than as a zero, because no data is not good news.
Within the 2010-2017 generation, 2014 Mercedes Benz E550 scores best at 66 and 2013 Mercedes Benz E550 worst at 73.
What this page cannot tell you
22 owner reports; fleet size estimated from this year's own recall paperwork. Every count on this page is therefore a floor: it is the number of owners who went to the trouble of filing with a federal agency, which is a small and self-selected fraction of the owners who had the fault.
Of those 22 reports, 11 carried an odometer reading, so the mileages here describe 50% of the sample rather than all of it. Owners also round: readings pile up on multiples of ten thousand, which is why this site publishes "about 90,000 miles" and not "91,438".
The failure modes are assigned by software reading the owner's own words, which is accurate in bulk and wrong in individual cases. A mode with a handful of reports may contain a misfiled one.
And nothing here predicts what one car will do. These are other people's complaints, filed years apart, on cars maintained by strangers. Read the page as a map of where this model year has previously gone wrong, then have the specific car in front of you inspected.
Questions this page answers
What are the most common problems with the 2012 Mercedes Benz E550?
The most-reported failures are airbag inflator rupture (7 reports, median 20,000 miles), no-start or intermittent start failure (2 reports) and ignition switch, key fob or immobilizer failure (2 reports, median 70,000 miles). Counts come from owner complaints filed with NHTSA, which are voluntary, so they show what owners bothered to report rather than every fault that occurred.
Is the 2012 Mercedes Benz E550 reliable?
It scores 71 out of 100 on our risk index, which is high — 141st riskiest of the 271 2012 vehicles we can rate. The score is a comparison against other 2012 vehicles, not a prediction about any individual car, and it is built from complaint rates, severity and how early failures appear.
Which year of the Mercedes Benz E550 is best?
Within the 2010–2017 generation, 2014 scores best at 66 out of 100 and 2013 worst at 73. Same body, same engines, different luck.
Where this comes from. Every figure above is computed from NHTSA owner complaints and recall records for this exact make, model and year. Complaints are voluntary and self-selected, so treat counts as a floor. The methodology page writes out each formula, and the same numbers are available as JSON.
What breaks at my mileage Compare with another car
Source Owner complaints and recall records published by the US National Highway Traffic Safety Administration, model years 1996–2027 Figures rebuilt Published by AtWhatMileage How every figure is computed