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2008 Mercedes-Benz E63 AMG

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By Research the Car 5 min read

The 2008 Mercedes-Benz E63 AMG is a high-performance sedan known for its powerful engine and luxurious features. It comes standard with a naturally aspirated 6.2L M156 V8 engine producing 507 horsepower and 465 lb-ft of torque, paired with a 7-speed automatic transmission (7G-TRONIC). While praised for its performance and comfort, some owners have reported specific issues related to its engine, transmission, and other components. Common likes include its raw power, comfortable interior, and distinctive AMG styling. Common dislikes include its relatively poor fuel economy, higher maintenance costs compared to standard E-Class models, and some specific reliability concerns.

Engine

6.2L M156 V8

  • Camshaft Adjuster Bolts Failure
    • Description/Symptoms: This issue affects earlier production M156 engines. The original camshaft adjuster bolts are prone to failure. Symptoms include ticking noises from the engine, especially on startup or when idling, and potential engine misfires due to improper camshaft timing. Complete failure can lead to significant engine damage.
    • Solution: Replace the original camshaft adjuster bolts with the updated design. Some owners opt to replace the camshaft adjusters themselves as preventative maintenance.
    • Estimated Cost to Fix: $1,500 - $4,000+ (depending on if the adjusters are replaced at the same time and if there was engine damage)
    • Recalls: None Found
  • Valve Lifter/Tappet Noise
    • Description/Symptoms: Ticking noise, especially when cold. Can be caused by worn valve lifters or insufficient oil pressure.
    • Solution: Replacement of valve lifters. May require camshaft replacement if damage is present.
    • Estimated Cost to Fix: $2,000 - $6,000+
    • Recalls: None Found
  • Oil Leaks (Valve Cover Gaskets, Oil Filter Housing, Oil Cooler Lines)
    • Description/Symptoms: Visible oil leaks on the engine, often accompanied by the smell of burning oil. Common leak points include the valve cover gaskets, oil filter housing gasket, and oil cooler lines.
    • Solution: Replace the leaking gaskets or lines. Thoroughly clean the affected areas.
    • Estimated Cost to Fix: Valve Cover Gaskets ($300 - $800), Oil Filter Housing Gasket ($300 - $600), Oil Cooler Lines ($500 - $1,000)
    • Recalls: None Found
  • Intake Manifold Gasket Failure
    • Description/Symptoms: Air leaks. Rough running or hesitation.
    • Solution: Replace the gasket.
    • Estimated Cost to Fix: $600 - $1200
    • Recalls: None Found

Transmission

7G-TRONIC (722.9)

  • Torque Converter Issues
    • Description/Symptoms: Shuddering or vibrations at low speeds, especially during light acceleration. Can also manifest as harsh shifting or delayed engagement.
    • Solution: Replacement of the torque converter. Ensure proper fluid flush and filter replacement.
    • Estimated Cost to Fix: $2,500 - $4,500+
    • Recalls: None Found
  • Valve Body Issues
    • Description/Symptoms: Erratic shifting, harsh shifts, or failure to shift. Can trigger transmission fault codes.
    • Solution: Replacement or rebuild of the valve body. Requires specialized knowledge and equipment.
    • Estimated Cost to Fix: $1,500 - $3,500+
    • Recalls: None Found
  • Conductor Plate Failure
    • Description/Symptoms: Transmission stuck in limp mode, failure to shift, or incorrect gear selection. Fault codes related to the conductor plate are typically present.
    • Solution: Replacement of the conductor plate. Requires programming to the vehicle.
    • Estimated Cost to Fix: $800 - $1,800+
    • Recalls: None Found

Suspension

  • Airmatic Suspension Leaks/Failure
    • Description/Symptoms: Vehicle sagging on one or more corners, especially overnight. Fault codes related to the airmatic system. Compressor may run excessively or fail completely.
    • Solution: Identify and repair the source of the leak (air struts, valve block, air lines). Replace the compressor if necessary.
    • Estimated Cost to Fix: Air Strut Replacement ($1,000 - $2,000+ per strut), Compressor Replacement ($800 - $1,500+), Valve Block Replacement ($500 - $1,000+)
    • Recalls: None Found
  • ABC (Active Body Control) Suspension Issues
    • Description/Symptoms: Similar to airmatic issues, but related to the hydraulic system. Vehicle sagging, uneven ride height, fault codes. Noises from the hydraulic pump.
    • Solution: Identify and repair leaks in the hydraulic lines, struts, or pump. Replace the pump if necessary. Flush and replace the ABC fluid.
    • Estimated Cost to Fix: ABC Strut Replacement ($1,500 - $3,000+ per strut), ABC Pump Replacement ($1,500 - $3,000+), Hydraulic Line Repair ($300 - $1,000+)
    • Recalls: None Found

Electrical

  • EIS (Electronic Ignition Switch) Failure
    • Description/Symptoms: Key not recognized, difficulty starting the car, or complete failure to start. Can be intermittent initially.
    • Solution: Replacement of the EIS module. Requires programming to the vehicle.
    • Estimated Cost to Fix: $800 - $1,800+
    • Recalls: None Found
  • SAM (Signal Acquisition Module) Failure
    • Description/Symptoms: Various electrical issues, such as malfunctioning lights, wipers, or other accessories. Fault codes related to the SAM module.
    • Solution: Diagnosis to determine the specific SAM module causing the issue (front, rear, etc.). Replacement of the faulty SAM module. Requires programming to the vehicle.
    • Estimated Cost to Fix: $500 - $1,500+
    • Recalls: None Found
  • Battery Drain Issues
    • Description/Symptoms: Battery draining quickly, especially if the car is not driven frequently.
    • Solution: Diagnose parasitic draw. Could be due to faulty modules (SAM, COMAND, etc.) or aftermarket accessories.
    • Estimated Cost to Fix: Varies widely depending on the source of the draw. ($100-$1,000+)
    • Recalls: None Found

Exterior

  • Headlight Condensation
    • Description/Symptoms: Moisture buildup inside the headlight housing.
    • Solution: Remove and reseal the headlight housing or replace the headlight assembly.
    • Estimated Cost to Fix: $300 - $2,000+ (depending on the severity and if replacement is required)
    • Recalls: None Found

Interior

  • COMAND System Issues
    • Description/Symptoms: COMAND screen freezing, not powering on, or malfunctioning buttons. Navigation system errors.
    • Solution: Software update, replacement of the COMAND unit.
    • Estimated Cost to Fix: $500 - $2,000+
    • Recalls: None Found
  • Sunroof Issues
    • Description/Symptoms: Sunroof not opening or closing properly, getting stuck, or making excessive noise.
    • Solution: Lubricate the sunroof tracks and mechanism. Repair or replace damaged components.
    • Estimated Cost to Fix: $200 - $1,500+
    • Recalls: None Found

Summary

The 2008 Mercedes-Benz E63 AMG, while a thrilling performance sedan, is prone to certain issues that potential buyers should be aware of. Engine issues, especially camshaft adjuster bolt failure and valve lifter noise, can be costly to repair. Transmission problems related to the torque converter, valve body, and conductor plate are also common concerns. The airmatic or ABC suspension systems are complex and can be expensive to maintain. Electrical issues with the EIS and SAM modules can also arise. Overall, the maintenance and repair costs for this vehicle can be significant. Buyers should factor these potential expenses into their purchasing decision and prioritize vehicles with well-documented maintenance histories and ideally pre-purchase inspections by qualified mechanics experienced with Mercedes-Benz AMG models.

Mercedes-Benz, E63 AMG
Mercedes-Benz E63 AMG 2008
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