The Mercedes Benz 2001 S-Class, particularly the S600 model equipped with the M137 engine, represents the pinnacle of luxury and performance from the early 2000s. For enthusiasts and those seeking a sophisticated driving experience, a 2001 Mercedes Benz can still hold considerable appeal. However, prospective owners, and even current owners, should be keenly aware of the maintenance demands that come with a vehicle of this age and complexity. While the allure of a flagship Mercedes Benz 2001 is undeniable, understanding the potential pitfalls, especially concerning the robust but demanding 137 engine, is crucial for a realistic ownership experience.
Common Maintenance Challenges in a 2001 Mercedes Benz S600
The 2001 Mercedes Benz S600, while offering a powerful V12 engine and opulent features, is known for encountering specific issues as it ages. These are often centered around the engine, suspension, and related systems. Being prepared for these potential maintenance points is key to enjoying a 2001 Mercedes Benz without unexpected financial strain.
Engine (M137) Specific Concerns
The M137 engine in the 2001 Mercedes Benz S600, while a technological marvel, has several known weaknesses that typically surface around the 40,000-mile mark, and often require specialized attention.
- Coil Packs: A frequent failure point in the M137 engine is the coil packs. Owners often find both coil packs needing replacement, and the cost can be substantial. Retail prices can range upwards of $900 each, making this a significant expense.
- MAP (Manifold Absolute Pressure) Sensor: The MAP sensor is another component prone to failure. While the part itself is less expensive than coil packs, replacement is often necessary as part of routine maintenance or troubleshooting engine performance issues.
- ECI (Engine Control Ignition) Unit: The ECI unit, vital for engine management, can also fail, adding to the list of potentially costly electronic component replacements.
- ABC (Active Body Control) Pump and System: The sophisticated ABC suspension system, a hallmark of the S600, relies on a high-pressure hydraulic pump. This pump is known to fail, and replacements can be expensive. Furthermore, the Pentosin fluid required for the ABC system is specialized and adds to the overall maintenance costs. Leaks and strut failures within the ABC system are also common and costly issues.
- Oil Leaks: Oil leaks are a persistent concern. The oil pressure sensor is a known culprit for leaks that can saturate the wire harness if not addressed promptly, potentially damaging upstream oil sensors. Replacing these sensors, along with the spark plug gaskets often disturbed during access, adds to the maintenance burden. The oil cooler, located deep within the engine, is another notorious leak source, requiring significant labor to access and repair, often involving head removal and substantial expense.
- Spark Plugs and Gaskets: The V12 engine necessitates 24 spark plugs. Replacement, while standard maintenance, can be costly due to the number of plugs and the associated gaskets.
- Motor Mounts: Engine and transmission mounts are subject to wear and tear. The motor mounts in the 2001 S600 are known to collapse, and their replacement is labor-intensive, often requiring engine lifting and removal of peripheral components for access.
Chassis and General Wear Items
Beyond the engine and ABC suspension, other areas of the 2001 Mercedes Benz S600 require attention due to age and normal wear:
- Control Arm Bushings: The rubber bushings in the front control arms are prone to deterioration. If neglected, this wear can lead to more severe damage to the subframe, making timely bushing replacement crucial.
- Wire Harness Issues: As mentioned with the oil pressure sensor leak, the wire harness itself can be vulnerable to oil contamination and general degradation over time, leading to electrical gremlins.
DIY Considerations and Essential Tools
For those inclined to undertake maintenance on their 2001 Mercedes Benz, some key investments can prove invaluable:
- Diagnostic Code Reader: A quality OBD-II code reader is essential for diagnosing issues and understanding fault codes.
- WIS (Workshop Information System) Access: Access to the Mercedes Benz WIS, often available on CD or online, provides detailed repair manuals and technical information specific to the vehicle, crucial for DIY repairs.
- Specialized Tools: Certain repairs will require specialized tools beyond a standard mechanic’s toolkit. Researching specific repair procedures beforehand is advised.
- Pentosin Fluid and Electrical Contact Cleaner: Keeping supplies of Pentosin fluid for the ABC system and electrical contact cleaner for addressing sensor and connector issues is practical for preventative maintenance and troubleshooting.
Conclusion: Informed Ownership of a 2001 Mercedes Benz S600
Owning a 2001 Mercedes Benz S600 can be a rewarding experience, offering a blend of luxury and performance that is still impressive today. However, it is vital to approach ownership with open eyes regarding potential maintenance. Being aware of the common issues, particularly those associated with the M137 engine and ABC system, and being prepared for the associated costs, whether through DIY efforts or professional servicing, is essential for a positive and sustainable ownership journey with a Mercedes Benz 2001 S600.
