For enthusiasts of classic Mercedes-Benz like the W123 and W124, the W210 series, including the Mercedes E320, might have initially seemed like a departure from the robust engineering of its predecessors. However, many owners and mechanics, after experiencing the W210 firsthand, have come to appreciate its unique strengths, particularly the reliability and ease of maintenance of the E320 model.
The Robust Heart of the E320: The M112 Engine
The Mercedes-Benz E320 is powered by the M112 engine, a V6 known for its exceptional durability. According to seasoned Mercedes-Benz technicians, the M112 is considered “bulletproof” internally. It’s not uncommon to find high-mileage E320s still running strong on their original engine components. While minor issues like valve cover breather leaks can occur, these are easily addressed. Moreover, the spark plugs are designed for extended life, typically lasting up to 100,000 miles, reducing routine maintenance needs.
Dependable Transmission: The 722.6
The 722.6 transmission in the Mercedes E320 is another highlight of its reliable engineering. While early versions had a bushing issue, later “facelift” models incorporated revisions to resolve this. Regular transmission fluid changes are crucial for longevity, but beyond that, the 722.6 transmission is remarkably robust. Common issues are often limited to the electrical connector/bushing or the conductor plate, both relatively inexpensive and straightforward fixes. Opting for a facelift version of the W210 E320 is often recommended due to these transmission upgrades and other enhancements.
Addressing Common W210 Quirks for Long-Term Reliability
Like any car, the W210 Mercedes E320 has a few common areas that may require attention, especially in older models. For gasoline-powered E320s, preventative maintenance is key. Replacing belts, hoses, and fluids as part of “new” old car preparation is advisable. Additionally, proactively replacing the crank position sensor is a cheap and smart measure to prevent potential future issues.
Window regulators are known to be a potential point of failure in W210s, so be prepared for replacements if they haven’t been addressed already. For those who drive long distances, preemptive maintenance on the transmission, such as replacing the conductor plate and electrical plug during a fluid change, can provide extra peace of mind. Carrying a spare MAF sensor and K40 relay for road trips is also a prudent step for dedicated owners. Finally, keeping the front wheel bearings properly packed is important, as they might be slightly more susceptible to wear compared to older Mercedes chassis.
Conclusion: The Mercedes-Benz E320 – A Reliable Choice
Despite initial skepticism from some classic Mercedes-Benz enthusiasts, the Mercedes-Benz E320 (W210) has proven itself to be a surprisingly reliable and maintainable vehicle, particularly the facelift models. With a robust M112 engine and a dependable 722.6 transmission, combined with addressing a few common maintenance points, the E320 offers a compelling blend of Mercedes-Benz engineering and long-term dependability. For those seeking a reliable and relatively easy-to-work-on Mercedes, the E320 is definitely worth considering.
