2007 Mercedes-Benz R350

2007 Mercedes-Benz R350

Overview

The 2007 Mercedes-Benz R350, a luxury crossover, offers a blend of SUV versatility and minivan practicality. While generally well-regarded for its comfort and features, like any vehicle, it has specific areas that have seen more attention from owners regarding reliability. This analysis focuses on documented technical issues beyond routine maintenance, providing insights into potential concerns for owners and prospective buyers. We will examine the powertrain, suspension, electrical systems, and other key areas to offer a comprehensive reliability picture for this model year.

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Engine

3.5L V6 (M272)

Variable Valve Timing (VVT) Actuator Failure

• Symptoms: Check engine light, rough idle, reduced engine power, rattling noise from the engine.
• Solution: Replacement of VVT actuators and potentially camshafts.
• Cost: $1,500 - $3,000

Intake Manifold Flap Failure

• Symptoms: Check engine light (P2004, P2005, P2006 codes), poor engine performance, rough idle.
• Solution: Replacement of the intake manifold assembly.
• Cost: $800 - $1,500

Transmission

7G-TRONIC (722.9) Automatic Transmission

Valve Body Malfunction

• Symptoms: Harsh shifting, delayed engagement, transmission warning light, slipping gears.
• Solution: Repair or replacement of the valve body.
• Cost: $1,200 - $2,500

Torque Converter Issues

• Symptoms: Shuddering at low speeds, slipping, rough engagement.
• Solution: Replacement of the torque converter.
• Cost: $1,000 - $2,000

Suspension

Standard Chassis

Air Suspension Leaks (if equipped)

• Symptoms: Vehicle sagging on one or more corners, uneven ride height, compressor running excessively.
• Solution: Repair or replacement of air springs, lines, or compressor.
• Cost: $500 - $1,500 per corner

Electrical

General Electrical System

CAN Bus Communication Errors

• Symptoms: Various warning lights, malfunctioning dashboard displays, intermittent electrical issues across multiple systems.
• Solution: Diagnosis and repair of faulty modules or wiring.
• Cost: $300 - $1,000+

Headlight Control Module Failure

• Symptoms: Headlights not working, flickering, or adaptive lighting malfunctions.
• Solution: Replacement of the headlight control module.
• Cost: $200 - $500

Exterior

Body and Trim

No widespread issues reported.

• Symptoms: N/A
• Solution: N/A
• Cost: Varies

Interior

Cabin Electronics and Features

Panoramic Sunroof Malfunctions

• Symptoms: Sunroof not opening/closing properly, motor noise, water leaks.
• Solution: Repair or replacement of sunroof motor, tracks, or seals.
• Cost: $400 - $1,000

COMAND System Glitches

• Symptoms: Infotainment system freezing, unresponsiveness, audio issues.
• Solution: Software updates or replacement of the COMAND unit.
• Cost: $500 - $1,500

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Summary Verdict

The 2007 Mercedes-Benz R350, while offering a luxurious and spacious experience, presents a few key areas that warrant attention for potential buyers. The 3.5L V6 engine is susceptible to issues with its Variable Valve Timing system and intake manifold, which can lead to significant repair costs. The 7-speed automatic transmission, while generally smooth, can experience problems with its valve body and torque converter. Electrical gremlins, particularly related to CAN bus communication and control modules, are also noted. Owners of models equipped with air suspension should be aware of potential leaks. Despite these points, many R350s have proven reliable with proper maintenance, but prospective buyers should factor in the possibility of addressing these common technical concerns.