There are no child safety locks on the rear doors. The manufacturer seems to think the fact that the door locks once the car is moving over a specific speed is good enough, the problem is a child can still pull the handle twice to open the door while it's moving, or simply lift the rear lock latch and pull the door handle once, and out they kid goes at highway speeds. I personally don't understand how the manufacturer could get away with selling this car without this most basic safety feature for children's protection. Either we wait until some kids fly out this car before acting, or force the manufacturer to come up with a solution to this safety hazard.
The worst 2009 Mercedes Benz S Class problems
Ranked by number of owner complaints. Mileage and cost come from what owners wrote.
- Airbags1
- Brakes1
- Locks1
Problems by type
Tap a problem to see which part fails, at what mileage and in which other years.
- Airbags1
- Brakes1
- Locks1
Recalls 1
Latches/locks/linkages
- What is wrong
- Mercedes benz is recalling 54 my 2009 s-class, w221 vehicles. During production the front and rear passenger side door locks may have been mistakenly interchanged during production. The exchange of a front and a rear passenger side door lock would result in a passenger side door that cannot be opened by merely pulling on the interior handle and a rear door lock that can be opened with a simple pull of the interior door handle even if locked.
- Risk
- This situation could affect the safe exiting of a vehicle in the event of a crash or protection of children from inadvertent opening of the rear door.
- Remedy
- Dealers will check the part number on all door locks and replace any incorrectly installed door lock free of charge. The recall began on march 27, 2009. Owners may contact mercedes benz at 1‑800‑367‑6372.
Recall number 09V081000 · Recall details
Technical service bulletins for the 2009 Mercedes Benz S Class 11
Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.
- Complaints about poor wiping effect of winshield wiper
- Mercedes-benz: the malfunction light is on with multiple possible trouble codes stored
- Mercedes-benz: there is cracking noise at the front seats when operating the height adjustment
- Mercedes-benz: there is a transmission trouble code stored
- Mercedes-benz: the auto-transmission switches to limp home mode or has no power
- Mercedes-benz: shock absorber procedure
- Mercedes: airbag durability and reliability
- Mercedes (xentry): engine diagnosis warning lamp activated
- Mercedes: parktronic intermittently not functioning
- Mercedes: the software for the panoramic sliding sunroof may not meet current production specifications
2009 Mercedes Benz S Class fuel economy
Official EPA estimates in miles per gallon (MPGe for electric). Ranges cover trims that share the same engine.
| Engine | Drive | City | Highway | Combined |
|---|---|---|---|---|
| 5.5L 8‑cyl | 4WD | 14 | 21 | 17 |
| 5.5L 12‑cyl | RWD | 11 | 17 | 13 |
| 6.2L 8‑cyl | RWD | 11 | 17 | 13 |
| 6.0L 12‑cyl | RWD | 11 | 17 | 13 |
What 2009 Mercedes Benz S Class owners say
Most recent owner complaints, unedited.
Tl* the contact owns a 2009 mercedes benz s class. The contact was driving 55 MPH when a vehicle ahead of him abruptly stopped. The contact applied the brakes as the pedal was applied down to the floorboard and remained. The contact was unable to release the brake pedal and crashed into the preceding vehicle. The frontal air bags did not deploy and the sos system did not engage. There were no reported injuries. A police report was available (sp1l15000802). The vehicle was towed to a local repair facility. The manufacturer was not contacted. The failure and the current mileages were 8,000.
Compare the 2009 Mercedes Benz S Class
Other model years
Questions about the 2009 Mercedes Benz S Class
Is the 2009 Mercedes Benz S Class reliable?
Owners have filed 2 complaints about the 2009 Mercedes Benz S Class, fewer than a typical S Class model year.
What is the 2009 Mercedes Benz S Class year score?
The 2009 Mercedes Benz S Class scores 94 out of 100 (good). The score compares it with the other model years of the Mercedes Benz S Class: 75 is a typical year, 50 means twice the usual complaints, and serious complaints and recalls lower it.
What is the most common problem with the 2009 Mercedes Benz S Class?
Airbags, with 1 complaint. Next is brakes (1).
How many recalls does the 2009 Mercedes Benz S Class have?
1 recall, covering latches/locks/linkages.
What gas mileage does the 2009 Mercedes Benz S Class get?
Official estimates for the 2009 Mercedes Benz S Class range from 13 to 17 mpg combined. The most efficient version (5.5L 8-cyl, 4WD) gets 14 city and 21 highway.
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