The Mercedes Benz E 320 2003 is a popular luxury sedan, known for its comfort and performance. However, like any used vehicle, especially one from this model year, potential buyers should be aware of specific issues that could arise. Understanding these common problems can help you make an informed decision and potentially save on future repair costs.
Potential Problem Areas in the 2003 Mercedes Benz E 320
Several areas of concern are frequently discussed by Mercedes-Benz owners and mechanics regarding the 2003 E 320 model.
Radiator and Transmission Fluid Contamination
One significant issue is the potential for radiator failure. This failure can lead to coolant contaminating the transmission fluid. Such contamination can cause serious damage to the transmission, resulting in costly repairs. It’s crucial to inspect the transmission fluid for any signs of coolant contamination before purchasing a 2003 E 320.
SBC Sensonic Brake Control System
The 2003 E 320 is equipped with the Sensonic Brake Control (SBC) system, a brake-by-wire technology. This system, while innovative for its time, is known for potential component failures. Mercedes-Benz offered extended warranties on SBC components for 10 years, which has likely expired for a 2003 model. Failure of the SBC system can be a safety concern and expensive to rectify. Later models of the E-Class moved away from SBC to a more conventional braking system.
Electrical System Considerations
The electrical system in the 2003 E 320 differs from later W211 models. Earlier models, including the 2003, often feature a dual-battery setup and a separate battery control module. While not inherently problematic, this system is more complex than the simplified single-battery system found in later years.
Teleaid System Limitations
The 2003 Mercedes Benz E 320 may have an older, analog-only Teleaid/MBRACE system. This older system may no longer be functional without an equipment upgrade. While upgrades are available, they can be costly. It’s important to consider that the original emergency services and roadside assistance features tied to this system might not be readily available without investment.
Transmission Fluid Service
Regardless of the specific model year, regular maintenance is vital for the longevity of any vehicle. For the 2003 E 320, paying attention to transmission fluid is particularly important. It is generally recommended to perform the first transmission fluid and filter replacement between 50,000 and 70,000 miles to ensure optimal performance and prevent potential issues.
Pre-Purchase Inspection is Key
Before purchasing a used Mercedes Benz E 320 2003, a thorough pre-purchase inspection is highly recommended. Ideally, this inspection should include a diagnostic scan using a system like Star Diagnostic. This scan can reveal stored error logs and fault codes from various modules within the car. These logs can provide valuable insights into the vehicle’s history, potential recurring problems, and the mileage at which faults occurred. While dealers may not readily provide this level of detail, seeking an independent mechanic with Mercedes-Benz expertise and diagnostic capabilities is a worthwhile step in assessing the condition of a used 2003 E 320.
By being aware of these potential issues and conducting a thorough inspection, you can make a more informed decision when considering a used Mercedes Benz E 320 2003.
