1997 Mercedes Benz S320 Problems & Reliability

If you’re a car enthusiast or just someone who appreciates the timeless elegance of classic luxury vehicles, the 1997 Mercedes Benz S320 might have caught your eye. Known for its sophisticated design and smooth ride, this model has been a favorite among those who value both style and comfort. However, like any vehicle that’s been around for a few decades, the S320 isn’t without its quirks and challenges. In this blog post, we’ll dive into some of the common problems owners have encountered with this iconic car, as well as discuss its overall reliability. Whether you’re considering buying one or just curious about its performance, we’ve got you covered. While the 1997 Mercedes Benz S320 is often praised for its solid build and luxurious features, it’s important to be aware of the potential issues that can arise with a car of this age. From electrical gremlins to suspension woes, we’ll explore the typical problems that have been reported by owners over the years. But don’t worry, it’s not all doom and gloom! We’ll also highlight the aspects of the S320 that have stood the test of time, making it a beloved choice for many. So, buckle up and join us as we take a closer look at what makes the 1997 S320 both a classic gem and a bit of a challenge.
Body Components

Parts Assessed:

Windows, power locks, manual locks, doors, trunk, tailgate, mirrors, power and manual seat controls, seat belts, sunroof, convertible top, glass defects.

Reported Problems:

N/A

Analysis:

No major problem has been reported

Parts Assessed

Brake pads, brake rotors, brake calipers, anti-lock braking system (ABS), brake lines, brake master cylinder, brake booster, parking brake, brake sensors, regenerative braking system (if applicable).

Reported Problems:

  • Closing Assist/Door Lock Issues Due to Pneumatic System Problems

Analysis:

The 1997 Mercedes Benz S320 is known for its luxury and comfort, but it does have some quirks, especially with the closing assist and door lock system. Many owners have reported issues with the pneumatic system, which can lead to problems with the doors not locking or closing properly. While it’s a bit of a hassle, it’s a common issue for this model year and something to keep in mind if you’re considering buying one.

Parts Assessed

Air conditioning compressor, AC condenser, AC evaporator, heater core, blower motor, automatic climate control system, refrigerant leaks, HVAC electrical components, temperature sensors, ventilation system.

Reported Problems:

  • Glove box hinges, center console arm rest, and cup holders may break

Analysis:

The 1997 Mercedes Benz S320 has a few common issues with its interior components, particularly the glove box hinges, center console arm rest, and cup holders, which are prone to breaking. While these problems can be annoying, they dont necessarily impact the overall performance of the vehicle. However, its something to keep in mind if youre considering this model, as you might need to budget for some interior repairs.

Parts Assessed

CV joints, driveshaft, axles, differential, limited-slip differential (if applicable), traction control system, electronic stability control (ESC), four-wheel-drive (4WD) components, all-wheel-drive (AWD) components, transfer case, driveline vibration.

Reported Problems:

  • Insulation Degrades on Engine Wiring Harness and Leaves Conductors Exposed

Analysis:

The 1997 Mercedes Benz S320 has a known issue with the insulation on the engine wiring harness degrading over time, which can leave the conductors exposed. This problem can lead to electrical issues and potentially affect the overall reliability of the vehicle. If you’re considering this model, it’s something to keep in mind, as it might require attention or replacement to maintain optimal performance.

Parts Assessed

Infotainment system, GPS navigation, Bluetooth connectivity, touchscreen display, phone pairing, backup camera, rear entertainment system, head-up display, instrument cluster, digital gauges.

Reported Problems:

  • Bad Switch/Blower Motor Resistor Assembly May Cause Inoperative Heater Blower Motor

Analysis:

The 1997 Mercedes Benz S320 has a known issue with the switch/blower motor resistor assembly, which can lead to the heater blower motor becoming inoperative. This problem can be a bit of a hassle, especially during colder months when you rely on the heater. While it’s a specific issue, addressing it promptly can help maintain the overall reliability of your S320.

Parts Assessed

Radiator, radiator hoses, cooling fan, water pump, thermostat, antifreeze leaks, engine coolant reservoir, overheating prevention system, intercooler (if applicable).

Reported Problems:

  • Window Regulator Failure is Common

Analysis:

The 1997 Mercedes Benz S320 is generally a solid vehicle, but one common issue that pops up is window regulator failure. This can be a bit of a hassle, especially if you find yourself needing to replace it more than once. Overall, while the car is reliable in many aspects, keeping an eye on the window regulators might save you some trouble down the road.

Parts Assessed

Alternator, battery, ignition switch, ignition coil, spark plugs, ignition wires, engine control module (ECM), electronic ignition system, auto stop/start function, battery cables, engine wiring harness, fuse box, relays, starter motor.

Reported Problems:

  • High Usage Vehicles May Experience Ignition Lock and Tumbler Failures

Analysis:

The 1997 Mercedes Benz S320 is generally a solid vehicle, but if you’re driving it a lot, you might run into some issues with the ignition lock and tumbler. These parts can wear out over time, especially in high-usage scenarios, which might leave you dealing with some frustrating starting problems. Overall, while it’s a reliable ride, it’s good to keep an eye on these components if you’re clocking a lot of miles.

Parts Assessed

Engine rebuilds, cylinder head, head gasket, timing chain, timing belt, camshaft, crankshaft, connecting rods, turbocharger or supercharger (if applicable), valve train, piston rings, oil control system, engine knocking, engine misfires.

Reported Problems:

  • Leaks at Compressor, Hose Manifold, or Evaporator Core May Cause Poor AC Performance

Analysis:

The 1997 Mercedes Benz S320 is known to have some issues with its AC system, particularly with leaks at the compressor, hose manifold, or evaporator core, which can lead to poor performance. While this can be a frustrating problem, it’s not uncommon for vehicles of this age to experience such issues. Overall, the S320 is a solid car, but keeping an eye on the AC system and addressing any leaks promptly can help maintain its reliability.

Parts Assessed

Muffler, catalytic converter, exhaust manifold, heat shields, exhaust pipes, oxygen (O₂) sensors, resonator, exhaust leaks, emissions control system.

Reported Problems:

  • Repair Leaks From Head Gasket/Timing Cover Gasket Before Oil and Coolant Intermix

Analysis:

The 1997 Mercedes Benz S320 is known for its solid build, but like any older vehicle, it can have its quirks. One common issue is the potential for leaks from the head gasket or timing cover gasket, which, if not addressed, can lead to oil and coolant mixing. Staying on top of these repairs can help maintain the car’s reliability and keep it running smoothly for years to come.

Parts Assessed

Fuel pump, fuel injectors, fuel rail, fuel pressure regulator, throttle body, fuel gauge sensor, evaporative emissions system, EGR (exhaust gas recirculation) valve, charcoal canister, fuel filter, fuel tank, vapor leaks.

Reported Problems:

  • Transmission Oil Seals May Leak on High Mileage Vehicles

Analysis:

The 1997 Mercedes Benz S320 is generally a reliable vehicle, but one issue to watch out for is the potential for transmission oil seals to leak, especially in high mileage cars. This problem can lead to transmission fluid loss, which might affect the car’s performance if not addressed promptly. Regular maintenance and inspections can help catch this issue early and keep your S320 running smoothly.

Flagship-One-Engine-Computer-In-Stock
Onboard & Powertrain Electronics

Parts Assessed

Cruise control, keyless entry system, push-button start, wiper motor, warning lights, power mirrors, interior lighting, exterior lighting, dashboard indicators, electronic parking brake, tire pressure monitoring system (TPMS), alarm and security system, remote engine start, heated and ventilated seats, heated steering wheel, wireless charging pad.

Reported Problems:

  • Faulty Mass Air Flow Sensor Causing Erratic Engine Operation and Poor Fuel Economy

Analysis:

The 1997 Mercedes Benz S320 is known to have issues with a faulty mass air flow sensor, which can lead to erratic engine operation and poor fuel economy. This problem can be a bit of a headache for owners, as it affects the car’s performance and efficiency. While the S320 is generally a solid vehicle, this particular issue can be a significant drawback in terms of overall reliability.

Parts Assessed

Dashboard rattles, squeaks, wind noise, door seals, weather stripping, water leaks, air leaks, excessive road noise, suspension noise, drivetrain noise, exhaust rattles, engine bay noises.

Reported Problems:

  • Replace Brake Rotors When Pads are Worn and Squeaking

Analysis:

The 1997 Mercedes Benz S320 is generally a reliable vehicle, but like any car, it has its quirks. One common issue is the need to replace brake rotors when the pads are worn and start squeaking, which is a typical maintenance task for a car of this age. Keeping up with this and other routine maintenance can help ensure the S320 continues to run smoothly.

Parts Assessed

Paint durability, clear coat protection, rust prevention, corrosion resistance, body panel alignment, door seals, window trim, plastic trim, metal finishes, fading, cracking, peeling.

Reported Problems:

  • Bad Dampening Actuators Can Cause Rough Ride in Rear

Analysis:

No major problem has been reported

Parts Assessed

Struts, shocks, control arms, sway bars, ball joints, tie rods, wheel bearings, power steering pump, power steering fluid leaks, electronic power steering (EPS), steering rack and pinion, steering linkage, alignment issues, torsion bars, springs, air suspension (if applicable).

Reported Problems:

  • Rough running motor/lack of power due to failed ignition coil packs/spark plug resistors

Analysis:

The 1997 Mercedes Benz S320 is known to have some issues with rough running motors and a lack of power, often due to failed ignition coil packs or spark plug resistors. These problems can affect the overall reliability of the vehicle, leading to a less smooth driving experience. While it’s a classic ride, keeping an eye on these components is key to maintaining its performance.

Parts Assessed

Transmission rebuild, transmission replacement, torque converter, transmission solenoids, gear selector, gear shifting, transmission control module (TCM), transmission fluid leaks, clutch (manual transmission), automatic transmission valve body, CVT (continuously variable transmission) components, dual-clutch transmission (DCT) components.

Reported Problems:

  • Cracked Driveshaft Flex Discs May Cause Driveshaft Movement/Vibration

Analysis:

The 1997 Mercedes Benz S320 is generally known for its solid build and luxury features, but it does have some issues to watch out for. One notable problem is the cracked driveshaft flex discs, which can lead to driveshaft movement or vibration. While this issue can affect the car’s overall reliability, regular maintenance and timely repairs can help keep it running smoothly.

Conclusion

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