The 2009 Mercedes-Benz E350, while lauded for its luxury and performance, has presented some recurring issues for owners, particularly as models age and accumulate mileage. Prospective buyers and current owners should be aware of these potential problems to make informed decisions regarding maintenance and repairs. This article delves into common issues reported by owners of the 2009 Mercedes E350, providing insights into what to watch out for.
Drivetrain and Differential Concerns
One notable issue that has surfaced in the 2009 Mercedes E350, especially in wagon (Estate) models with 4MATIC all-wheel drive, is related to the rear differential. Owners have reported a whining noise emanating from the rear differential, often starting around 85,000 to 90,000 miles. In some cases, this necessitates a rebuild or replacement of the differential.
Dealership repairs for the rear differential can be costly, sometimes reaching upwards of $6,000, as they often opt for complete replacement with a new or rebuilt unit. However, independent specialists might offer more affordable solutions, such as rebuilding the existing differential, potentially saving owners a significant amount of money. Finding a reputable mechanic experienced with Mercedes-Benz differentials is crucial if this issue arises.
Engine Oil Consumption
Another reported problem with the 2009 E350 is oil consumption. Some owners have observed their vehicles burning oil, with no apparent external leaks. This issue can be perplexing as there are no visible drips, and checking components like the oil breather often reveals no obvious cause. The rate of oil consumption can vary, with some owners needing to add a quart of oil between 10,000-mile oil change intervals, while others experience less frequent consumption. Monitoring oil levels regularly is advisable to address this issue promptly if it occurs.
Suspension and Chassis Wear
As with many vehicles reaching this age and mileage, suspension components are subject to wear and tear. 2009 Mercedes E350 owners have reported issues such as the failure of rear air springs, typically around the 120,000-mile mark. Replacement of air springs is a known maintenance item for vehicles equipped with air suspension systems.
Furthermore, bushings in the front control arms are another area prone to wear, requiring replacement to maintain proper suspension performance and alignment. Exhaust hangers can also rust and break, especially with exposure to road salt and harsh driving conditions. Incidents like hitting speed bumps can exacerbate the issue, leading to broken exhaust hangers.
Door Lock Actuator
A minor yet common annoyance reported by some 2009 E350 owners is a “jumping” front door lock. This typically indicates an issue with the door lock actuator, which may require replacement. While not a critical mechanical problem, it can be an inconvenience and affect the overall ownership experience.
CV Boot and Axle Assembly Issues
Issues with CV (Constant Velocity) boots are also reported. Tears in the CV boots, particularly the inner boots, can occur and require attention. Timely replacement of torn CV boots is important to prevent damage to the CV joints themselves, which can lead to more extensive and costly repairs.
A significant concern highlighted by some owners is the potential backorder situation for front axle assemblies. Reports suggest that Mercedes-Benz dealerships have indicated extended backorder times for front right and left axle assemblies, ranging from several months to over a year. This can create considerable difficulties if axle replacement is needed. While aftermarket axles are available, some concerns exist regarding their quality and longevity, with reports of vibrations and premature failures. Owners are advised to carefully inspect CV boots, especially the inner ones, as preventative maintenance in this area can potentially avoid more significant problems down the line.
Conclusion
The 2009 Mercedes-Benz E350, like any vehicle, has potential проблемs that owners should be aware of. Common issues include rear differential whine, oil consumption, suspension wear (air springs, control arm bushings), door lock actuators, and CV boot/axle concerns. Understanding these potential problems allows owners to proactively monitor their vehicles, address issues promptly, and make informed repair decisions. Regular maintenance and inspections are crucial for mitigating these risks and ensuring the continued reliable performance of a 2009 Mercedes E350.
