The 2001 Mercedes-Benz S600, with its powerful M137 engine, represents the pinnacle of luxury and performance from the early 2000s. For those considering or currently owning this vehicle, understanding the realities of maintenance and potential pitfalls is crucial. While offering a driving experience unlike many others, the 2001 Mercedes S600, particularly models equipped with the M137 engine, demands diligent care and proactive maintenance to avoid significant expenses.
Common Maintenance Challenges with the 2001 Mercedes S600 M137 Engine
Owners of the 2001 Mercedes S600 often encounter a predictable set of maintenance issues, many of which tend to surface around the 40,000-mile mark. Addressing these proactively can mitigate larger problems down the road.
Ignition System Concerns
A frequent issue involves the ignition system. Both coil packs are known to fail, incurring substantial costs for replacement. Owners might face retail prices starting around $936, with averages reaching $1200. Additionally, the MAP (Manifold Absolute Pressure) unit, while less expensive at approximately $250 from dealerships or $150 for Bosch replacements, adds to the maintenance tally. The ECI (Engine Control Ignition) unit can also require replacement, with costs around $800.
ABC Suspension System Maintenance
The Active Body Control (ABC) suspension system, while delivering a smooth and controlled ride, is another area requiring attention. The ABC pump is prone to failure, with replacement costs mirroring coil packs, ranging from $914 retail to $1200 on average. Rebuilt pumps offer a more economical solution at around $650. Maintaining the ABC system also necessitates using Pentosin fluid. A full system service can require up to 10 cans, costing around $50 each from dealers or $20 from auto parts stores. Don’t forget the filter, typically around $30. Strut replacements are also anticipated, with each strut potentially costing around $2000, and the car having four in total.
Engine and Oil Leaks
Oil leaks can become a significant concern. The wire harness can become saturated with oil originating from the oil pressure sensor. If undetected, this can damage upstream oil sensors, costing around $185 from dealers or $80 for Bosch replacements. The 2001 Mercedes S600 M137 engine has four upstream sensors, with one being particularly difficult to access, often requiring coil pack removal. Spark plug maintenance also adds to the expense. Replacing the 24 spark plugs, which can range from $6 to $12 each, along with the 12 spark plug gaskets needed after coil pack removal, can be costly.
Mounts and Bushings
Motor mounts are known to collapse. While the parts themselves are around $100 each, replacement is labor-intensive, requiring engine lifting and, on the left side, removal of the manifold, ABC pump, and AC compressor. Furthermore, the front control arm rubber bushings deteriorate, and if not addressed promptly, can damage the subframe.
Major Engine Work: Oil Cooler Leaks
One of the most significant potential repairs is related to the oil cooler. Leaks from the oil cooler necessitate removing the top of the engine, including both heads, as the cooler is located beneath them. This repair can be a major undertaking, potentially costing between $5000 and $7000 if performed by a shop.
DIY and Proactive Maintenance for the 2001 Mercedes S600
Despite these potential issues, maintaining a 2001 Mercedes S600 M137 engine is achievable, especially with informed preparation and a proactive approach. Investing in a code reader is advisable for diagnosing issues early. Access to repair information, such as a CD with WIS (Workshop Information System) manuals, can be invaluable. Keeping essential fluids like Pentosin on hand, along with electrical plug cleaner and ample paper towels, is recommended.
For those inclined to perform their own maintenance, specialized information and tools are necessary. However, with the right resources and a methodical approach, owners can navigate the challenges of maintaining their 2001 Mercedes S600 and continue to enjoy its unique blend of luxury and power. Staying informed and addressing issues promptly is key to a positive ownership experience.
