2007 Mercedes-Benz CLS550

2007 Mercedes-Benz CLS550

Overview

The 2007 Mercedes-Benz CLS550, part of the C219 generation, is a luxury grand tourer known for its distinctive styling and powerful performance. Powered by a robust 5.5-liter V8 engine, it offers a blend of comfort and dynamic driving. While generally well-regarded for its build quality and premium features, like any vehicle of this age and complexity, it can experience specific issues. This analysis focuses on documented reliability concerns beyond routine maintenance, providing insights into potential problem areas for owners and prospective buyers.

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Engine

5.5L V8 (M273)

Intake Manifold Runner Flap Failure

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

Oil Cooler Leaks

• Symptoms: Oil smell in engine bay, oil residue on coolant, coolant loss.
• Solution: Replacement of the oil cooler and seals.
• Cost: $500 - $900

Transmission

7G-TRONIC (722.9)

Transmission Control Module (TCM) Failure

• Symptoms: Harsh shifting, slipping gears, transmission warning lights, inability to shift.
• Solution: Replacement of the TCM.
• Cost: $1000 - $2000

Torque Converter Issues

• Symptoms: Shuddering during acceleration, slipping, delayed engagement.
• Solution: Replacement of the torque converter.
• Cost: $1500 - $2500

Suspension

AirMatic Suspension

Air Strut Leaks

• Symptoms: Vehicle sagging on one or more corners, uneven ride height, compressor running excessively.
• Solution: Replacement of leaking air struts or seals.
• Cost: $800 - $1500 per corner

Air Compressor Failure

• Symptoms: Vehicle does not raise, compressor makes noise but no air is delivered, suspension warning light.
• Solution: Replacement of the air compressor unit.
• Cost: $700 - $1200

Electrical

General Electrical System

SAM (Signal Acquisition Module) Issues

• Symptoms: Intermittent electrical faults, malfunctioning lights, power window issues, CAN bus errors.
• Solution: Diagnosis and repair or replacement of the SAM module.
• Cost: $500 - $1500

Keyless Go System Malfunctions

• Symptoms: Difficulty starting the car, door handle sensors not working, key fob recognition issues.
• Solution: Diagnosis and repair/replacement of related sensors or modules.
• Cost: $300 - $800

Exterior

Standard Exterior

No widespread issues reported.

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

Interior

Standard Interior

No widespread issues reported.

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

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Summary Verdict

The 2007 Mercedes-Benz CLS550 is a luxurious and powerful vehicle, but potential buyers should be aware of its specific reliability concerns. The engine, particularly the M273, can suffer from intake manifold runner flap failures and oil cooler leaks. The 7G-TRONIC transmission is prone to issues with its Control Module and torque converter. The AirMatic suspension system is a common source of problems, with leaks in air struts and compressor failures being prevalent. Electrical gremlins, often related to the SAM module, can also arise. While the exterior and interior are generally robust, the complexity of the powertrain and suspension systems means that maintenance and repair costs can be significant. Regular servicing and prompt attention to warning signs are crucial for maintaining this vehicle.