Metrix Premium Front Left & Right Lower Rearward Control Arm Kit

Our review of the Metrix Premium Chassis Parts front lower rearward control arm kit finds it best suited for owners of 2007-2011 Mercedes-Benz CLS and 2007-2009 E-Class models who want a reliable, near-OEM replacement without paying dealer prices. The single biggest reason to buy is its combination of factory-grade certification and practical preparation: Metrix ships the pair pre-greased, built from steel and produced under IATF 16949 and ISO 9001 processes, so it arrives ready to install and aimed at lasting performance.

Key Features

• Model compatibility: Fits a wide range of 2007-2011 CLS and 2007-2009 E-Class variants, helping owners find a direct-fit replacement for common platforms.
• Complete kit: Includes the front left lower rearward control arm with ball joint assembly RK620187 and the front right lower rearward control arm RK620183, so both sides are replaced together for balanced handling.
• Pre-greased components: Supplied pre-greased to reduce initial wear and provide smoother movement during the first miles after installation.
• Steel construction: Sturdy steel material increases durability under suspension loads compared with softer aftermarket options.
• Manufacturing standards: Produced under IATF 16949 and ISO 9001, indicating controlled quality and design intended to exceed OEM standards.
• Warranty coverage: Backed by a 3 year / 36,000 mile limited warranty from installation, offering measurable peace of mind for street use.

Who It's For

This kit is aimed at Mercedes owners who need to replace worn front lower rearward control arms and prefer a product manufactured to controlled automotive quality standards. It suits DIY mechanics and independent repair shops that want a pair of control arms and a ball joint assembly that fit common CLS350, CLS500, CLS550, CLS63 AMG and multiple E-Class years.

Those who should look elsewhere include owners of models outside the listed years or drivetrains, and customers seeking adjustable aftermarket performance arms for custom alignment settings, since this kit is a direct replacement built to OEM-style specifications rather than a tunable performance part.

Pros & Cons

Pros

• Direct-fit compatibility across many 2007-2011 CLS and 2007-2009 E-Class variants for easier sourcing and installation.
• Pre-greased and steel construction reduces early wear and improves initial ride stability after replacement.
• Manufactured under IATF 16949 and ISO 9001 standards and backed by a 3 year / 36,000 mile warranty for reliability.

Cons

• Not an adjustable or performance-tuned control arm, so it will not meet needs for custom alignment or track-specific setups.

Specifications

Included parts	Front left lower rearward control arm with ball joint (RK620187) and front right lower lower rearward control arm (RK620183)
Compatible vehicles	2007-2011 CLS350/CLS550/CLS63 AMG; 2007-2009 CLS500; 2007-2009 E-Class models listed
Material	Steel
Pre-conditioning	Pre-greased for extended lifespan
Certifications	IATF 16949 and ISO 9001
Quantity in box	2 control arms (pair)
Warranty	3 Year / 36,000 miles limited warranty from installation

Our Verdict

The Metrix Premium control arm kit is a practical, value-focused replacement for the specified Mercedes CLS and E-Class years, offering solid build quality and factory-style preparation. For owners seeking dependable, ready-to-install control arms with warranty protection and standards-based manufacturing, this kit represents a sensible choice that delivers stability and eliminates common knocking noises without the premium dealer price.

Frequently Asked Questions

Does this kit include both left and right control arms?
Yes, the package contains one front left lower rearward control arm with ball joint (RK620187) and one front right lower rearward control arm (RK620183).

Will these arms fit my 2010 E350?
They are listed as compatible with certain 2007-2009 E350 RWD and 2007-2011 CLS models; confirm fitment with the vehicle year and drivetrain before purchase.

Is there any warranty coverage?
Yes, Metrix provides a 3 year / 36,000 mile limited warranty from the date of installation.