ECCPP AC Compressor for Mercedes-Benz S550 CL550 - Quiet Cooling

In this review the ECCPP AC Compressor is evaluated for owners who need a direct replacement compressor for late 2000s Mercedes-Benz S550 or CL550 models. The bottom line: this unit is a complete, pre-filled AC compressor with clutch that aims to restore cooling quickly and affordably for 2007-2011 S550 and 2007-2009 CL550 applications, and it is best for DIYers or independent shops that can verify pulley fit and install correctly.

Key Features

• Direct compatibility: The compressor lists the common part parameters and vehicle fits so buyers can match it to 2007-2011 Mercedes-Benz S550 and 2007-2009 CL550 applications for a straightforward replacement.
• Pre-filled and pressure tested: The unit is pre-lubricated with 130 ml of PAG46 oil and pressure tested with nitrogen to reduce the risk of leaks on installation.
• Complete assembly: The package includes the compressor and clutch, which removes the need to source separate clutch components.
• Sturdy construction: An aluminum housing provides structural stability intended to withstand long-term automotive use.
• OEM-style specifications: The 7SEU17C compressor type, 6-groove pulley and 100 mm pulley diameter mirror common OEM dimensions for the listed models.

Who It's For

This compressor is aimed at Mercedes-Benz owners, independent mechanics, and experienced DIYers who need a cost-effective replacement for the factory A/C compressor in 2007-2011 S550 or 2007-2009 CL550 vehicles. It is especially suitable when the original compressor has failed and the buyer can confirm the pulley count and mounting match their vehicle.

Buyers who should look elsewhere include owners who want dealer-original parts with manufacturer warranty backing or anyone unable to verify pulley specifications and fitment, since some customer reports indicate occasional pulley mismatches and differing long-term reliability.

Pros & Cons

Pros

• Included clutch and pre-filled oil make installation faster for trained installers.
• Pressure testing and lubrication at the factory reduces the chance of immediate leaks on first use.
• Good value for money compared with sourcing multiple components separately.

Cons

• Some users report mixed long-term reliability and concerns about lifespan.
• Fit and pulley alignment can be inconsistent, so professional verification during purchase and installation is recommended.

Specifications

Our Verdict

The ECCPP AC Compressor is a practical, budget-friendly replacement that includes clutch and factory oil, making it a sensible option for owners and independent shops restoring A/C function on compatible Mercedes-Benz models. It delivers solid short-term value, but buyers should verify pulley and mounting details and prefer professional installation to avoid fitment issues and to maximize service life.

Frequently Asked Questions

Is this compressor ready to install out of the box?
Yes, it is pre-filled with 130 ml of PAG46 oil and pressure tested, though professional installation is recommended.

Which vehicles does it fit?
It is specified for 2007-2009 CL550 5.5L, 2008-2011 S550 4.7L, and 2007-2011 S550 5.5L; confirm pulley count and mounting before purchase.

Are there common issues to watch for?
Customers report mixed experiences with long-term durability and occasional pulley fitment differences, so check compatibility and consider a trained installer.