2007 Mercedes-Benz CL550
2007 Mercedes-Benz CL550
Overview
The 2007 Mercedes-Benz CL550, part of the C216 generation, is a luxury grand tourer known for its powerful performance and sophisticated features. While generally well-regarded for its comfort and driving dynamics, like any complex vehicle, it has specific areas that have seen more attention from owners regarding reliability. This analysis focuses on documented common issues beyond routine maintenance, providing insights into potential concerns for owners and prospective buyers. The CL550 is equipped with a potent V8 engine and advanced systems, which, while contributing to its appeal, can also be sources of specific repair needs.
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 of the runner flap mechanism.
- Cost: $800 - $1500
Timing Chain Wear
- Symptoms: Rattling noise from the front of the engine, especially on startup; check engine light with timing correlation codes.
- Solution: Replacement of the timing chain, tensioners, and guides.
- Cost: $1500 - $3000
Transmission
7G-Tronic (722.9)
Valve Body Malfunction
- Symptoms: Harsh shifting, delayed engagement, slipping gears, transmission warning light.
- Solution: Repair or replacement of the transmission valve body.
- Cost: $1200 - $2500
Torque Converter Issues
- Symptoms: Shuddering at low speeds, slipping, unusual noises.
- Solution: Replacement of the torque converter.
- Cost: $1000 - $2000
Suspension
Active Body Control (ABC)
Hydraulic Leaks
- Symptoms: Vehicle sagging, suspension warning light, fluid leaks under the car.
- Solution: Repair or replacement of leaking hoses, struts, or pump.
- Cost: $1000 - $3000+
ABC Pump Failure
- Symptoms: Loss of hydraulic pressure, suspension dropping, loud whining noise from pump.
- Solution: Replacement of the ABC hydraulic pump.
- Cost: $800 - $1500
Electrical
General Electrical System
SAM Unit (Signal Acquisition Module) Issues
- Symptoms: Various warning lights, malfunctioning lights (headlights, taillights), power window issues, CAN bus communication errors.
- Solution: Diagnosis and repair or replacement of the SAM module.
- Cost: $500 - $1200
Keyless Go System Malfunctions
- Symptoms: Difficulty starting the car, doors not unlocking/locking, key fob not recognized.
- Solution: Diagnosis and potential replacement of keyless go module or related sensors.
- Cost: $300 - $800
Exterior
Body and Trim
No widespread issues reported.
- Symptoms: N/A
- Solution: N/A
- Cost: Varies
Interior
Cabin Electronics and Comfort
Seat Control Malfunctions
- Symptoms: Power seats not moving, memory functions failing.
- Solution: Diagnosis and repair or replacement of seat control modules or motors.
- Cost: $300 - $700
Climate Control System Issues
- Symptoms: AC not blowing cold, inconsistent temperature, blower motor failures.
- Solution: Repair or replacement of AC compressor, refrigerant recharge, or blower motor replacement.
- Cost: $500 - $1500
Summary Verdict
The 2007 Mercedes-Benz CL550 offers a luxurious and powerful driving experience, but potential owners should be aware of its specific reliability concerns. The most common areas requiring attention are the Active Body Control (ABC) suspension, which can be costly to repair due to hydraulic leaks and pump failures, and the 7-speed automatic transmission (7G-Tronic), which may experience issues with the valve body or torque converter. Engine-related concerns include potential failures of the intake manifold runner flaps and wear on the timing chain. Electrical gremlins, particularly with the SAM unit and Keyless Go system, can also arise. While the exterior and interior are generally robust, specific electronic comfort features can sometimes falter. Regular maintenance and proactive inspection of these known problem areas are crucial for maintaining the CL550’s performance and value.