2007 Mercedes-Benz SLK350

2007 Mercedes-Benz SLK350

Overview

The 2007 Mercedes-Benz SLK350, part of the R171 generation, is a compact luxury roadster known for its sporty performance and retractable hardtop. Powered by a robust 3.5-liter V6 engine, it offers a compelling blend of power and refinement. While generally considered a reliable vehicle, like any car of this age and complexity, certain components may experience issues. This analysis focuses on documented, non-wear-and-tear related problems that owners have reported, providing insights into potential repair areas and associated costs for those considering purchasing or maintaining this model.

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Engine

3.5L V6 (M272)

Intake Manifold Runner Flap Failure

• Symptoms: Check engine light, rough idle, loss of power, P2004/P2005/P2006 error codes.
• Solution: Replacement of the intake manifold assembly or repair kit.
• Cost: $600 - $1200

Balance Shaft Gear Wear

• Symptoms: Check engine light, P0016/P0017 error codes (crankshaft/camshaft position correlation), rough running.
• Solution: Replacement of the balance shaft and associated gears/sprockets.
• Cost: $1500 - $3000

Transmission

7G-TRONIC Automatic

Transmission Control Module (TCM) Failure

• Symptoms: Harsh shifting, slipping gears, inability to shift, ‘Transmission Malfunction’ warning.
• Solution: Replacement of the TCM.
• Cost: $800 - $1500

Valve Body Issues

• Symptoms: Erratic shifting, delayed engagement, rough shifts.
• Solution: Repair or replacement of the valve body.
• Cost: $1000 - $2000

Suspension

Standard Chassis

No Major Issues

• Symptoms: No widespread issues reported.
• Solution: No widespread issues reported.
• Cost: No widespread issues reported.

Electrical

General Electrical System

SAM (Signal Acquisition Module) Corrosion/Failure

• Symptoms: Intermittent electrical faults, non-functioning lights, power windows, or other accessories.
• Solution: Cleaning and sealing of SAM module, or replacement.
• Cost: $500 - $1000

Headlight Ballast Failure

• Symptoms: Xenon headlights not turning on or flickering.
• Solution: Replacement of the headlight ballast.
• Cost: $300 - $600

Exterior

Retractable Hardtop System

Hydraulic Leaks/Pump Failure

• Symptoms: Roof not operating, slow operation, fluid leaks under the car.
• Solution: Repair or replacement of hydraulic lines, cylinders, or pump.
• Cost: $1000 - $2500

Locking Mechanism Issues

• Symptoms: Roof not latching or unlatching properly, warning lights.
• Solution: Adjustment or replacement of roof latches and actuators.
• Cost: $500 - $1200

Body Panels

No Major Issues

• Symptoms: No widespread issues reported.
• Solution: No widespread issues reported.
• Cost: No widespread issues reported.

Interior

General Interior

No Major Issues

• Symptoms: No widespread issues reported.
• Solution: No widespread issues reported.
• Cost: No widespread issues reported.

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Summary Verdict

The 2007 Mercedes-Benz SLK350 offers a rewarding driving experience, but potential buyers should be aware of specific reliability concerns. The M272 engine, while generally powerful, is prone to issues with the intake manifold runner flaps and balance shaft gears, which can be costly to repair. The 7G-TRONIC transmission can also develop problems with its control module or valve body. The complex retractable hardtop system is another area where hydraulic leaks or locking mechanism failures can occur. Electrical issues, particularly with the SAM module, are also documented. Despite these potential drawbacks, many SLK350s remain reliable with proper maintenance. Addressing these known issues proactively can help ensure a more dependable ownership experience.