1997 Mercedes Benz S500 Problems & Reliability

If you’re a car enthusiast or just someone who appreciates the finer things in life, the 1997 Mercedes Benz S500 might have caught your eye. Known for its luxurious design and powerful performance, this classic sedan has long been a symbol of prestige and engineering excellence. However, like any vehicle that’s been around for a few decades, the S500 isn’t without its quirks and challenges. In this blog post, we’ll dive into some of the common problems owners have faced with the 1997 model and explore its overall reliability. Whether you’re considering buying one or just curious about its legacy, we’ve got you covered. While the 1997 Mercedes Benz S500 is often praised for its smooth ride and opulent 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 take a closer look at what you might expect if you’re thinking about adding this classic to your garage. But don’t worry, it’s not all doom and gloom—many owners still swear by their S500s, thanks to its robust build and timeless appeal. So, buckle up as we explore the ups and downs of owning a 1997 Mercedes Benz S500 and help you decide if it’s the right ride for you.
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 S500 has some reliability issues, particularly with the closing assist and door lock systems due to problems with the pneumatic system. These issues can be a bit of a hassle, as they might cause the doors not to lock or close properly, which can be inconvenient and potentially costly to fix. Overall, while the car is known for its luxury and performance, these pneumatic system problems can be a notable downside for owners.

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:

  • Engine Performance Problems Due to Crankshaft Position Sensor Failure

Analysis:

The 1997 Mercedes Benz S500 is known for its luxurious ride, but it can run into some engine performance issues due to crankshaft position sensor failure. This problem can lead to rough idling, stalling, or even difficulty starting the engine, which can be a hassle for owners. While its a common issue for this model year, regular maintenance and timely sensor replacement can help keep the S500 running smoothly.

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 S500 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, especially if the wiring hasn’t been replaced or inspected recently.

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:

  • Replace Brake Rotors When Pads are Worn and Squeaking

Analysis:

The 1997 Mercedes Benz S500 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 S500 continues to run smoothly.

Parts Assessed

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

Reported Problems:

  • Flush Brake Fluid Every Two Years

Analysis:

The 1997 Mercedes Benz S500 is generally a reliable vehicle, but one key maintenance tip is to flush the brake fluid every two years. This regular maintenance helps prevent potential brake issues and ensures the braking system remains in top condition. Keeping up with this simple task can contribute significantly to the overall longevity and reliability of your S500.

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:

  • Leaks Develop at Differential Seals/Cover on High Mileage/Older Vehicles

Analysis:

The 1997 Mercedes Benz S500 is generally a solid vehicle, but like many older cars, it can develop leaks at the differential seals or cover, especially as it racks up the miles. This is a common issue in high-mileage or older vehicles, so it’s something to keep an eye on if you’re considering buying or maintaining one. Overall, while the S500 is known for its luxury and performance, addressing these leaks promptly can help maintain its reliability.

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:

  • Cracked Driveshaft Flex Discs May Cause Driveshaft Movement/Vibration

Analysis:

The 1997 Mercedes Benz S500 is known for its luxury and performance, but one issue to watch out for is the cracked driveshaft flex discs, which can lead to driveshaft movement or vibration. This problem can affect the overall driving experience and may require attention to maintain the car’s reliability. Despite this, many owners still appreciate the vehicle’s classic appeal and solid engineering.

Parts Assessed

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

Reported Problems:

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

Analysis:

The 1997 Mercedes Benz S500 is known for its luxury and performance, but it does have some reliability issues, particularly with the heater blower motor. A common problem is the bad switch or blower motor resistor assembly, which can cause the heater blower motor to become inoperative. While this issue can be frustrating, it’s a fixable problem that doesn’t overshadow the overall quality of the vehicle.

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:

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

Analysis:

The 1997 Mercedes Benz S500 is known for its luxury and performance, but it does have some reliability issues, particularly with the mass air flow sensor. This faulty sensor can lead to erratic engine operation and poor fuel economy, which can be frustrating for owners. While the car offers a smooth ride, addressing this sensor issue is crucial for maintaining its overall performance.

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Onboard 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:

  • Window Regulator Failure is Common

Analysis:

The 1997 Mercedes Benz S500 is known for its luxurious ride, but one common issue that pops up is the window regulator failure. This problem can be a bit of a hassle, especially if you find yourself unable to roll your windows up or down. While it’s a notable issue, many owners still appreciate the car’s overall performance and comfort, though it’s something to keep in mind if you’re considering this model.

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:

  • Bad Dampening Actuators Can Cause Rough Ride in Rear

Analysis:

The 1997 Mercedes Benz S500 is known for its luxury and performance, but it does have some issues that can affect the ride quality. One common problem is with the dampening actuators, which can lead to a rough ride in the rear of the vehicle. While this issue can be a bit of a nuisance, addressing it with proper maintenance can help maintain the overall reliability of the car.

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:

  • Head Light Lenses Become Cloudy/Opaque Due To Sun Exposure

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:

  • Coolant Leak Due to Cracked/Broken Heater Core Outlet Housing

Analysis:

The 1997 Mercedes Benz S500 is known for its luxury and performance, but one common issue is the coolant leak caused by a cracked or broken heater core outlet housing. This problem can lead to overheating if not addressed promptly, affecting the car’s overall reliability. Regular maintenance and timely repairs are key to keeping this classic ride running smoothly.

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:

  • Wear in Climate Control Unit Buttons May Cause Climate Control System Failure

Analysis:

The 1997 Mercedes Benz S500 is generally known for its solid build and luxury features, but it does have some quirks. One notable issue is the wear in the climate control unit buttons, which can lead to the climate control system failing. While this doesn’t overshadow the car’s overall reliability, it’s something to keep an eye on if you’re considering this classic ride.

Conclusion

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