TRQ Spark Plug Set 16 Piece Iridium Compatible with 98-08

In this review of the TRQ Spark Plug Set, the bottom line is simple: this 16-piece kit is aimed at owners of late 1990s and 2000s Mercedes V8 engines who want an economical, direct-fit replacement that mirrors OE fitment. It is best for a DIYer or independent shop needing a full set for dual-plug banks or multi-cylinder tune-ups, offering straightforward installation and clear OE reference numbers. The review notes consistent reports of improved fuel efficiency and fit, while acknowledging mixed feedback on long-term performance.

Key Features

• Direct Fit: The plugs are designed as an OE replacement so they install without modification and match factory fitment for listed Mercedes V8 models.
• Complete 16-Piece Kit: Supplied as a full set of 16 spark plugs so the entire engine can be serviced in one purchase, saving time and trips to multiple parts sources.
• OE Reference Match: The listing includes many OE reference numbers so buyers can cross-check compatibility with factory parts and service manuals.
• Compatibility Listing: Vehicle-specific fitment is provided for a wide range of Mercedes models (SL, S, E, CLK, ML, CL, G, CLS, R) to reduce guesswork before purchase.
• Aftermarket Cross-References: A long list of aftermarket reference numbers helps confirm interchangeability with several branded plug types and specifications.

Who It's For

This kit suits Mercedes owners with V8 4.3L, 5.0L or 5.5L engines from roughly 1998 through 2008 who prefer a direct-fit, budget-friendly replacement that comes as a full set. It is particularly useful for home mechanics and independent shops that value having a complete, matched set on hand for routine tune-ups or engine maintenance.

Drivers seeking premium iridium longevity beyond standard OE-style plugs or those who demand extended high-performance life might look at branded factory iridium options; likewise, vehicles not listed in the fitment section should verify compatibility before purchase.

Pros & Cons

Pros

• Good reported quality and a reliable fit on the covered Mercedes engines, making installation fast and predictable.
• Noted value for money since a full 16-piece set covers the entire engine and reduces per-plug cost versus single purchases.
• Several customers reported improved fuel efficiency after installation, likely due to restored ignition consistency.

Cons

• Performance feedback is mixed in customer reports, with some users experiencing less satisfactory running behavior in certain engines.
• The listing stops short of claiming premium iridium lifespan compared with high-end OE iridium brands, so longevity may vary.

Specifications

Kit Quantity	16 spark plugs
Compatibility	Selected Mercedes V8 models 1998-2008
OE Reference Numbers	Multiple OE refs listed (e.g. 101905611G, 12590701, 2741023700)
Aftermarket References	Extensive cross-reference list included in listing
Fitment Type	Direct fit, OE replacement
Brand	TRQ

Our Verdict

The TRQ 16-piece spark plug set is a practical, cost-effective solution for Mercedes owners who need a direct-fit OE replacement for V8 engines across many late 1990s and 2000s models. It represents good value when a full-engine service is required and performs well for most users, particularly for improving fit and fuel economy, though those seeking the longest iridium life or guaranteed high-performance behavior may prefer factory-branded iridium plugs.

Frequently Asked Questions

Will this kit fit my Mercedes V8?
Check the vehicle-specific fitment listed in the product details against your year and engine code to confirm compatibility before purchase.

Are these true iridium plugs or iridium-compatible?
The product is described as iridium compatible and an OE replacement; the listing emphasizes fit and cross-references rather than marketing as premium iridium with extended life.

Can I install all 16 plugs myself?
Yes; customers report ease of installation if you have basic tools and mechanical experience, but follow torque specs and service procedures for your engine.