2007 Mercedes-Benz E320

2007 Mercedes-Benz E320

Overview

The 2007 Mercedes-Benz E320, part of the W211 generation, is generally regarded as a solid luxury sedan, particularly known for its comfortable ride and refined interior. This model year often features the robust 3.2L V6 diesel engine (OM642) paired with a 7-speed automatic transmission. While Mercedes-Benz vehicles are known for their advanced technology and premium feel, like any complex machine, they can encounter specific issues as they age. This analysis focuses on documented common problems beyond routine maintenance, providing insights into potential areas of concern for owners and prospective buyers of the 2007 E320.

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Engine

3.2L V6 Diesel (OM642)

Intake Manifold Runner Failure

• Symptoms: Check engine light, rough idle, loss of power, rattling noise from the intake area.
• Solution: Replacement of the intake manifold assembly or individual runner levers.
• Cost: $600 - $1200

Turbocharger Issues

• Symptoms: Loss of power, excessive smoke, whistling noises, check engine light.
• Solution: Turbocharger repair or replacement.
• Cost: $1500 - $3000

EGR Valve Malfunction

• Symptoms: Check engine light, rough idle, reduced engine performance, increased emissions.
• Solution: Cleaning or replacement of the EGR valve.
• Cost: $300 - $700

Transmission

722.9 7-Speed Automatic

Transmission Control Module (TCM) Failure

• Symptoms: Harsh shifting, slipping gears, failure to engage gears, limp mode, warning lights on the dashboard.
• Solution: Replacement of the TCM.
• Cost: $800 - $1500

Torque Converter Issues

• Symptoms: Shuddering at low speeds, slipping, delayed engagement, unusual noises.
• Solution: Replacement of the torque converter.
• Cost: $1000 - $2000

Suspension

Standard Chassis

Air Suspension (Optional)

• Symptoms: Vehicle sagging on one corner, loss of ride height, compressor running constantly, warning lights.
• Solution: Repair or replacement of air springs, compressor, or lines.
• Cost: $500 - $1500 per corner/component

Control Arm Bushings

• Symptoms: Clunking noises over bumps, vague steering feel, uneven tire wear.
• Solution: Replacement of worn control arm bushings.
• Cost: $400 - $800

Electrical

General Electrical System

SAM (Signal Acquisition Module) Issues

• Symptoms: Intermittent electrical problems, malfunctioning lights, power window issues, warning lights.
• Solution: Diagnosis and potential repair or replacement of the SAM unit.
• Cost: $500 - $1000

Window Regulator Failure

• Symptoms: Power windows not working, slow operation, or falling into the door.
• Solution: Replacement of the window regulator mechanism.
• Cost: $200 - $400

Headlight Ballast Failure

• Symptoms: Xenon headlights not turning on or flickering.
• Solution: Replacement of the headlight ballast.
• Cost: $200 - $500

Exterior

Body and Trim

No Major Issues

• Symptoms: No widespread issues reported.
• Solution: No widespread issues reported.
• Cost: N/A

Interior

Cabin Components

Sunroof Drain Clogs

• Symptoms: Water leaks into the cabin, musty smell, potential damage to electronics.
• Solution: Clearing of sunroof drains.
• Cost: $100 - $300

Seat Control Malfunction

• Symptoms: Power seats not adjusting correctly or at all.
• Solution: Diagnosis and repair/replacement of seat control modules or motors.
• Cost: $300 - $700

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Summary Verdict

The 2007 Mercedes-Benz E320 (W211) offers a compelling blend of luxury and performance, particularly with its diesel engine. While generally reliable, potential owners should be aware of common issues such as intake manifold runner problems, EGR valve faults, and transmission control module failures. The optional air suspension can also be a source of costly repairs. Electrical gremlins, particularly related to the SAM module and window regulators, are not uncommon. Despite these potential drawbacks, many of these issues are well-documented and repairable, allowing for continued enjoyment of this capable luxury sedan if properly maintained and addressed proactively.