2009 Mercedes-Benz R-class: common problems and reliability
The 2009 Mercedes-Benz R-class has 17 owner-filed NHTSA complaints and 0 recalls on record. The most-reported areas are air bags and visibility.
Safety record for the 2009 model year
17
Owner complaints
0
Recalls
0
Crash reports
0
Fire reports
Source: NHTSA complaints and recalls filed for 2009 Mercedes-Benz R-class vehicles (US, public record).
Is 2009 a good year for the R-class?
Across the 5 R-class model years we track, complaint volume runs from 13 (2010) to 128 (2006). With 17 complaints, the 2009 R-class sits about the same asthe model's median of 18.
These are raw NHTSA complaint totals, not adjusted for how many cars sold or how long each model year has been on the road. Older and higher-selling years accumulate more complaints.
Where owners report problems
air bags
9
visibility
2
structure
1
seat belts
1
fuel/propulsion system
1
What owners say across generations
\nSentiment is mixed, characterized by strong affection for the vehicle's core concept and driving experience, tempered by widespread and serious concerns about reliability and maintenance costs.
\nFrequent electrical issues: various sensor failures and control module problems. Frequency: very frequent.\n\nAir suspension failures: air ride suspension bags are a noted headache and common point of failure. Frequency: very frequent.\n\nEngine mount problems: likely to require attention. Frequency: recurrent.\n\nGeneral reliability and build quality: described as "finicky" with repairs needed approximately every 4-5 months; complex, over-engineered components lead to costly fixes. Frequency: very frequent.\n\nHigh running costs: requires premium unleaded fuel, with real-world fuel economy around 17 MPG; expensive routine maintenance (oil changes, spark plugs). Frequency: recurrent.\n\nRemarks\nThe provided data is limited, drawn from a small number of substantive owner discussions. The consensus is clear that the R-Class is a high-risk, high-reward vehicle: deeply satisfying when functional but demanding significant financial and logistical commitment to maintain. The community notes that parts can be sourced through online marketplaces and that dedicated owner groups are valuable resources for troubleshooting. The analysis is based on the first-generation (W251) model, as indicated by the referenced model year (2006).