TRQ Front Upper Control Arm & Ball Joint Driver LH LF - Direct Fit

In this review of the TRQ Front Upper Control Arm & Ball Joint Driver Left LH LF, the bottom line is practical and specific: it is a direct-fit replacement aimed at owners of late 1990s and early 2000s Mercedes C, CLK, E and SLK models who need a sturdy, pre-assembled upper control arm that saves installation time. The reviewer found this unit valuable for DIY mechanics because it arrives pre-assembled for a precise fit and matches original geometry, making it a straightforward swap on compatible front driver side applications.

Key Features

• Direct fit replacement: Designed to match original equipment fit for specified Mercedes front driver side upper applications, reducing the need for adjustments during installation.
• Pre-assembled design: Saves time and effort because the control arm and ball joint come assembled and ready to install as a single unit.
• Wide compatibility: Lists fitment across many model years for C230, C280, CLK320, E320, E430, SLK230 and SLK320, making it useful for owners of multiple model years.
• Replacement reference coverage: Offered under numerous reference numbers so it is easier to cross-check compatibility with an extensive parts list before buying.
• DIY resources: Backed by the brand's DIY video focus, which helps users verify procedures and reduce installation errors when a video is available.

Who It's For

This control arm is aimed at DIY mechanics and independent shops working on compatible Mercedes Benz models from the mid-1990s through the early 2000s who want a direct-fit part that reduces bench work. It suits owners replacing a worn upper control arm and ball joint who prefer a pre-assembled unit to limit complexity and installation time.

It may be less appropriate for people who need a different side or a lower control arm, or for vehicles outside the listed fitment years. Also, those who require OE-branded parts or who are replacing only a single worn ball joint might prefer to source individual components instead of a complete assembly.

Pros & Cons

Pros

• Direct-fit pre-assembled unit simplifies installation and typically matches original geometry.
• Positive reports on fit and quality indicate good value compared with purchasing dealer parts.
• Wide fitment list covers many C, CLK, E and SLK model years, easing compatibility for multiple vehicles.

Cons

• Some customers reported issues related to the ball joint on a minority of units, so inspection on receipt is advised.

Specifications

Part type	Front upper control arm with ball joint (driver side)
Vehicle fitment	Mercedes Benz C, CLK, E, SLK models (listed years)
Driver side	Left (LH, LF) front upper
Pre-assembled	Yes
Reference numbers	Includes RK90423; 2023304807; 2103308707 and many others
Brand	TRQ

Our Verdict

The TRQ Front Upper Control Arm & Ball Joint Driver LH LF is a practical value choice for owners of the specified Mercedes models who want a ready-to-install direct-fit replacement. It delivers good fit and ease of installation for DIY repairs, and while a small number of users reported ball joint problems, overall it represents a cost-effective alternative to dealer parts when fitment is confirmed.

Frequently Asked Questions

Will this part fit my car?
Check the detailed fitment list for specific model years; it is intended for front driver side upper applications on listed C, CLK, E and SLK models.

Is the ball joint replaceable separately?
This product ships as a pre-assembled control arm with ball joint; if you need only the ball joint, sourcing separate components may be preferable.

Does it require modification to install?
No, the unit is designed as a direct replacement; basic suspension removal and installation procedures are all that is typically required.