1999 Mercedes-Benz E420

Introduction: The 1999 Mercedes-Benz E420 is a mid-size luxury sedan powered by a 4.2-liter V8 engine. It was also available with a 3.2-liter V6 engine and a 5-speed automatic transmission. The E420 produced 275 horsepower and 302 lb-ft of torque. The E-Class was known for its luxurious interior, well-balanced handling, and impressive performance. However, it also had its fair share of reported issues.

Engine

• M113 4.2L V8
  • Timing Chain Tensioner Failure:
    • Description/Symptoms: The timing chain tensioner can fail, leading to a rattling noise and potential engine damage.
    • Solution: Replace the timing chain tensioner.
    • Estimated Cost to Fix: $2,000 - $3,000+
    • Recalls: None Found
  • Throttle Position Sensor Failure:
    • Description/Symptoms: The throttle position sensor can fail, causing the engine to run poorly or stall.
    • Solution: Replace the throttle position sensor.
    • Estimated Cost to Fix: $200 - $400
    • Recalls: None Found
• M112 3.2L V6
  • Intake Manifold Gasket Failure:
    • Description/Symptoms: The intake manifold gasket can fail, causing coolant and oil leaks.
    • Solution: Replace the intake manifold gasket.
    • Estimated Cost to Fix: $500 - $1,000
    • Recalls: None Found
  • Valve Stem Seal Failure:
    • Description/Symptoms: The valve stem seals can fail, causing excessive oil consumption and smoke from the exhaust.
    • Solution: Replace the valve stem seals.
    • Estimated Cost to Fix: $1,000 - $2,000
    • Recalls: None Found

Transmission

• 5-Speed Automatic
  • Transmission Fluid Leak:
    • Description/Symptoms: The transmission fluid may leak from the pan or hoses, causing low fluid levels and transmission problems.
    • Solution: Replace the leaking seal or hose and replenish the transmission fluid.
    • Estimated Cost to Fix: $300 - $700
    • Recalls: None Found
  • Transmission Control Module Failure:
    • Description/Symptoms: The transmission control module can fail, causing shifting problems and loss of power.
    • Solution: Replace the transmission control module.
    • Estimated Cost to Fix: $1,000 - $2,000
    • Recalls: None Found

Suspension

• Rear Air Suspension System Failure:
  • Description/Symptoms: The rear air suspension system can fail, causing the rear of the vehicle to sag or the ride to become rough.
  • Solution: Replace the air suspension components, such as the compressor, air bags, or lines.
  • Estimated Cost to Fix: $1,500 - $3,000
  • Recalls: None Found
• Front Strut Mount Failure:
  • Description/Symptoms: The front strut mounts can fail, causing clunking noises or a rough ride.
  • Solution: Replace the strut mounts.
  • Estimated Cost to Fix: $300 - $600
  • Recalls: None Found

Electrical

• Alternator Failure:
  • Description/Symptoms: The alternator can fail, causing a loss of electrical power and a dead battery.
  • Solution: Replace the alternator.
  • Estimated Cost to Fix: $500 - $1,000
  • Recalls: None Found
• Battery Drain:
  • Description/Symptoms: The battery can drain excessively, leaving the vehicle unable to start.
  • Solution: Test and replace any faulty electrical components or parasitic draws.
  • Estimated Cost to Fix: $100 - $500
  • Recalls: None Found

Exterior

• Sunroof Leak:
  • Description/Symptoms: The sunroof seals can fail, allowing water to leak into the cabin.
  • Solution: Replace the sunroof seals.
  • Estimated Cost to Fix: $500 - $1,000
  • Recalls: None Found
• Door Lock Actuator Failure:
  • Description/Symptoms: The door lock actuators can fail, preventing the doors from locking or unlocking.
  • Solution: Replace the door lock actuators.
  • Estimated Cost to Fix: $200 - $400 per door
  • Recalls: None Found

Interior

• Climate Control Display Malfunction:
  • Description/Symptoms: The climate control display can fail, making it difficult to adjust the climate settings.
  • Solution: Replace the climate control display.
  • Estimated Cost to Fix: $500 - $800
  • Recalls: None Found
• Navigation System Issues:
  • Description/Symptoms: The navigation system can experience software glitches or DVD drive issues.
  • Solution: Update the software or replace the DVD drive.
  • Estimated Cost to Fix: $300 - $700
  • Recalls: None Found

Summary: The 1999 Mercedes-Benz E420 is a capable luxury sedan, but it has its fair share of potential issues that can be costly to repair. The timing chain tensioner failure on the M113 engine is a major concern, as it can lead to catastrophic engine damage. The other issues, such as transmission fluid leaks and electrical problems, are less severe but can still be expensive to fix. Overall, the severity and cost of the issues can vary depending on the specific issue and the extent of the damage.