Vehicle price comparison
Mercedes S Class vs Cadillac XT4 Headlight Assembly prices
Saurabh Kumar
Co-Founder & CTO, Part Price Guide
Built the pricing pipeline that collects and normalizes used OEM part listings from salvage yards and online marketplaces across the US.
Ambika Sharma
Co-Founder & COO, Part Price Guide
12 years of project management and technical operations experience. Reviews price guides for sample size, fitment accuracy, and data freshness.
Price face-off
Median price comparison
Market analysis
Why does the Mercedes S Class headlight assembly cost more?
A used Mercedes S Class headlight assembly carries a median asking price of $1,450, which is 76% higher than the Cadillac XT4 at $825. Supply also plays a role: Mercedes S Class has 5,798 priced listings versus 789 for Cadillac XT4, and more listings generally mean more choices and more competitive pricing.
Our guide covers 11 model years for the Mercedes S Class (2015–2025) but only 7 for the Cadillac XT4 (2019–2025), so the Mercedes S Class data reflects a broader range of generations.
The Mercedes S Class headlight assembly is interchangeable across 13 model years versus just 7 for the Cadillac XT4 — that wider compatibility window means more donor vehicles in salvage yards and tends to push prices lower.
Buyer's checklist
What to check before buying a used headlight assembly
- Check for lens clarity — cloudy, yellowed, or hazed lenses reduce light output and can fail inspection.
- Look for moisture damage or watermarks inside the housing. A dried-out water line means a broken seal.
- Confirm whether the unit is halogen, HID/xenon, or LED — the wrong type won't plug in correctly and may need different ballasts.
- Inspect the tabs and mounting points for cracks. Headlight tabs are fragile and a broken tab means the assembly won't seat properly.
Full price guide
Mercedes S Class Headlight Assembly
$425 – $3,850 · 5,798 listings
Full price guide
Cadillac XT4 Headlight Assembly
$442 – $1,500 · 789 listings
Common questions
Mercedes S Class vs Cadillac XT4 headlight assembly FAQ
Is a used Mercedes S Class headlight assembly cheaper than a Cadillac XT4?
Cadillac XT4 has the lower median by $625 (76%). The Cadillac XT4 headlight assembly ranges from $442 to $1,500 across 789 listings, while the Mercedes S Class ranges from $425 to $3,850 across 5,798 listings.
Can I use a Mercedes S Class headlight assembly in a Cadillac XT4?
This comparison describes pricing, not interchangeability. Even when two parts share similar prices, they may require different engines, trims, electronics, or mounting points. Always match the seller's part number against your VIN before purchasing.
How many listings does this comparison cover?
This comparison draws from 5,798 priced Mercedes S Class listings and 789 priced Cadillac XT4 listings — 6,587 in total.
Are there different trim variants to choose from?
Yes. The Mercedes S Class headlight assembly has 22 trim variants and the Cadillac XT4 has 2. Variants differ by engine size, drivetrain, or part number — matching the right variant is critical for proper fitment.
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