Cadillac CT5 vs Mercedes-Benz C-Class: Which Used Buy Wins?

As used buys (July 2026), the Cadillac CT5 typically lists for $45,236 against $38,988 for the Mercedes-Benz C-Class (same model years — 2024–2026 — national medians from live listings). The Cadillac CT5 takes fuel economy (24 MPG combined vs 22 MPG); the Cadillac CT5 leads on NCAP safety (5.0★ vs 4.8★ average). Overall medians mix very different trims — at the cheapest common trims it's the LUXURY at $33,184 vs the C300 at $37,489; see the trim-by-trim tables for a fair match. Every figure below is live market data, not book values.

Head to head

Trim-by-trim prices (last 4 model years)

A fair comparison matches equivalent trims, not overall medians. Like for like: at the cheapest common trims, the Cadillac CT5 LUXURY ($33,184) faces the Mercedes-Benz C-Class C300 ($37,489); the most common trims on the market are the PREMIUM LUXURY (40.9% of Cadillac CT5 listings) and the C300 (50.2% of Mercedes-Benz C-Class listings); at the top of the market, the V-BLACKWING ($104,913) faces the AMG C43 ($48,951). Share = portion of the model's trim-labeled used listings (a supply-side popularity signal: what the market actually stocks and sells most). “Cheapest”/“Priciest” mark the ends of the quotable trim range — trim ladders don't map one-to-one across brands, so this is not a factory base-model claim.

Rows are aligned by price position (both sides sorted cheapest-first), not by equivalent equipment — trim names never map one-to-one across brands. Full per-trim detail (price ranges, mileage) is on each model's price page: Cadillac CT5 prices · Mercedes-Benz C-Class prices.

Used price by model year

Typical price = national median asking price of live listings for that model year (July 2026); MPG = EPA combined range across rated versions.

Frequently asked questions

Which is cheaper to buy used — Cadillac CT5 or Mercedes-Benz C-Class?

Comparing the same model years (2024–2026), the Mercedes-Benz C-Class is cheaper: it typically lists for $38,988 versus $45,236 for the Cadillac CT5 (national medians, July 2026).

Which gets better fuel economy — Cadillac CT5 or Mercedes-Benz C-Class?

The Cadillac CT5: its typical rated version returns 24 MPG combined versus 22 MPG for the Mercedes-Benz C-Class (median across EPA-rated versions of the compared years).

Which is safer — Cadillac CT5 or Mercedes-Benz C-Class?

By NCAP overall crash-test rating the Cadillac CT5 averages 5.0 of 5 stars across rated years versus 4.8 for the Mercedes-Benz C-Class. Always check the specific model year's rating in the table above.

Which is more reliable — Cadillac CT5 or Mercedes-Benz C-Class?

NHTSA lists an average of 1.7 recalls per model year for the Cadillac CT5 and 0.0 for the Mercedes-Benz C-Class — an edge for the Mercedes-Benz C-Class. Recall and complaint counts scale with sales volume, so treat them as context and check any specific car's VIN history.

Which trims should I actually compare?

Like for like: at the cheapest common trims, a Cadillac CT5 LUXURY typically lists for $33,184 vs $37,489 for a Mercedes-Benz C-Class C300; the most common trims on the market are the PREMIUM LUXURY ($44,024, 40.9% of Cadillac CT5 listings) and the C300 ($37,489, 50.2% of Mercedes-Benz C-Class listings); at the top of the market, the V-BLACKWING ($104,913) faces the AMG C43 ($48,951). Overall medians hide this trim mix — use the trim tables above for a fair match. Trim names never map one-to-one across brands, so "cheapest" means the least expensive trim with a real market share, not the factory base.

Dig deeper

Cadillac CT5 — live listings & specs Mercedes-Benz C-Class — live listings & specs Cadillac CT5 prices by year Mercedes-Benz C-Class prices by year Cadillac CT5 MPG by year Mercedes-Benz C-Class MPG by year

See also: All model comparisons · Best used cars by budget · Used car prices by model.