2009 Mercedes-Benz E320 Engine Problems
- Complaints
- 2about this part
- Share
- 25%of 8 total for the year
- Median mileage
- 93,909miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 2 complaints about the engine of the 2009 Mercedes-Benz E320, 25% of the 8 complaints for this model year. Where a mileage was given, the median is 93,909 miles.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“The oil cooler on the vehicle is leaking oil. This is a large, 15 hour repair, the total estimate to replace the cooler and seals is $2350. I have not had this repair done yet. Also had other oil seals replaced in the turbo area of the engine which cost me $989.91.”
NHTSA complaint #10778933, filed 2015-10, 123,000 miles“The contact owns a 2009 Mercedes-Benz E320. While driving various speeds, the vehicle failed to accelerate when the accelerator pedal was depressed. There were no warning indicators illuminated. The hesitation was persistent. The dealer diagnosed that the inlet port shutoff motor and linkage failed and needed to be replaced. The vehicle was repaired. The manufacturer was notified of the failure. The failure mileage was approximately 64,818.”
NHTSA complaint #10927283, filed 2016-11, 64,818 milesRelated service bulletins
- 11017039Apr 1, 2025Complaint Vehicle with atypical reduced heat output. Cause Silicate granulate may have escaped from a damaged bag in the expansion reservoir (not visible), reducing the coolant…
- 11031648Oct 5, 2021Mercedes-Benz USA, LLC will provide an Extended Modification Warranty for each vehicle that has received the Approved Emission Modification. The Extended Modification Warranty…
- 10158329Oct 9, 2017Oil in engine wiring harness
- 10135598Mar 25, 2015Engine diagnosis warning lamp lights up in instrument cluster, fault code U145400: "Implausible data were received from the ethanol sensor"
Engine: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2009 | 2 | 25% |
| 2008 | 3 | 30% |
| 2007 | 4 | 24% |
| 2005 | 9 | 4% |
| 2004 | 2 | 1% |
| 2003 | 7 | 3% |
| 2002 | 1 | 4% |
| 2001 | 3 | 8% |
| 2000 | 2 | 5% |
| 1998 | 2 | 5% |
| 1996 | 1 | 2% |
| 1995 | 2 | 2% |
| 1994 | 2 | 18% |
Other parts of the 2009 Mercedes-Benz E320
4 complaintsElectrical system
1 complaintsEngine cooling
1 complaintsExterior lighting
1 complaintsBody and structure
1 complaintsVehicle speed control
1 complaints
← All problems reported for the 2009 Mercedes-Benz E320
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 30, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology