2018 Mercedes Benz C Class prices in Illinois
The median pre-owned asking price for a 2018 Mercedes Benz C Class in Illinois is $20,454 based on 30 active listings.
As of July 25, 2026, the median asking price for a used 2018 Mercedes Benz C Class in Illinois is $20,454, based on 30 active dealer listings tracked by VinAssessment.
◷ Updated July 25, 2026 ▤ 30 active dealer listings, refreshed daily Methodology →
Typical: $17,542–$26,588 — the middle half of 30 asking prices
Why the wide range? Price depends mostly on configuration and mileage — see below. This spread covers the middle 96% of asking prices: we exclude the cheapest and priciest 2% (payment-priced ads, typos, salvage) so outliers don't distort it.
What moves the price on a 2018 Mercedes Benz C Class
The $17,542–$26,588 typical range isn't randomness — two factors explain most of it:
Asking prices run about $24,434 under 15K miles and fall to $13,992 over 105K miles — roughly $1,000 for every 10,000 miles.
The C300 typically asks $17,858, while the AMG C43 asks $26,245 — same year, same market.
Find your mileage and trim in the configurator below.
Configure the exact car
Modelled from 278 real asking prices, adjusted for mileage and location. Not a formal appraisal.
2018 Mercedes Benz C Class: a fair price for your mileage
A 2018 Mercedes Benz C Class sheds roughly $1,000 for every 10,000 miles. Find your mileage below.
Fair price by mileage and trim
| Mileage | All listings | C300 | C300-4M | AMG C43 |
|---|---|---|---|---|
| Under 15K miles | $24,434 | $17,999 | — | — |
| 15K–30K miles | $26,990 | $24,998 | $24,998 | — |
| 30K–45K miles | $22,744 | $21,400 | $20,797 | $33,150 |
| 45K–60K miles | $21,490 | $20,598 | $20,744 | $29,264 |
| 60K–75K miles | $18,600 | $17,898 | $18,600 | $27,240 |
| 75K–90K miles | $18,113 | $17,097 | $17,990 | $25,455 |
| 90K–105K miles | $15,996 | $15,995 | $14,980 | $22,782 |
| Over 105K miles | $13,992 | $13,590 | $13,697 | $20,995 |
Medians of live asking prices per band and version; “—” means fewer than 3 matching listings. National data.
Fair price by mileage — all versions combined
| Mileage ⓘ | Based on ⓘ | Fair price ⓘ | Typical range ⓘ |
|---|---|---|---|
| Under 15K miles | 11 listings | $24,434 | $18K–$39K |
| 15K–30K miles | 25 listings | $26,990 | $23K–$36K |
| 30K–45K miles | 74 listings | $22,744 | $20K–$32K |
| 45K–60K miles | 95 listings | $21,490 | $19K–$25K |
| 60K–75K miles | 126 listings | $18,600 | $17K–$23K |
| 75K–90K miles | 125 listings | $18,113 | $16K–$23K |
| 90K–105K miles | 107 listings | $15,996 | $15K–$19K |
| Over 105K miles | 108 listings | $13,992 | $13K–$16K |
Same trim and condition assumed — mileage is the biggest lever after configuration. National data; Illinois prices track it closely.
2018 Mercedes Benz C Class: price by trim
| Trim | Based on ⓘ | Median price ⓘ | Typical range ⓘ | Where it sits ⓘ |
|---|---|---|---|---|
| C300 | 278 listings | $17,858 | $15K–$21K | |
| C300-4M | 157 listings | $18,198 | $15K–$20K | |
| AMG C43 | 73 listings | $26,245 | $23K–$29K | |
| Other trims | 43 listings | $36,013 | — |
National data; Illinois prices track it closely.
Price history
Median asking price by month — national · shaded band is the typical range (25th–75th percentile)
The median listing price for a 2018 Mercedes Benz C Class is $18,989 (July 2026) — down 4.8% from $19,950 in August 2025.
Monthly price table
| Month | Median price | Typical range | Vehicles listed |
|---|---|---|---|
| July 2026 | $18,989 | $16K–$23K | 701 |
| June 2026 | $18,994 | $16K–$25K | 843 |
| May 2026 | $18,995 | $16K–$24K | 830 |
| April 2026 | $18,999 | $16K–$25K | 726 |
| March 2026 | $18,996 | $16K–$24K | 906 |
| February 2026 | $18,811 | $16K–$24K | 842 |
| January 2026 | $18,699 | $16K–$24K | 844 |
| December 2025 | $18,998 | $16K–$24K | 719 |
| November 2025 | $18,895 | $16K–$22K | 451 |
| October 2025 | $18,998 | $17K–$24K | 438 |
| September 2025 | $20,355 | $18K–$25K | 417 |
| August 2025 | $19,950 | $17K–$24K | 419 |
2018 Mercedes Benz C Class inventory across the U.S.
Keep exploring C Class prices
2018 Mercedes Benz C Class · $23,923 typical · 30 listingsOther Mercedes Benz C Class years
Live 2018 Mercedes Benz C Class listings, priced by VIN
Every VIN links to a full market report: decode, active listings and the local price band. Shop 2017–2019 Mercedes Benz C Class listings on VehiSales →.
More 2018 Mercedes Benz prices
Frequently asked questions
Why do 2018 Mercedes Benz C Class prices range from $12,817 to $51,095 in Illinois?
The spread comes down to configuration and mileage: higher-mileage, base-configuration examples sit near the low end, while low-mileage and premium configurations reach the top. Half of all listings fall between $17,542 and $26,588 — see the mileage and trim breakdowns above for where a specific vehicle lands.
How much should mileage change the price of a 2018 Mercedes Benz C Class?
Expect roughly $1,000 less for every 10,000 miles on the odometer. A 60K-mile example should cost about $3,000 less than a 30K-mile one of the same trim — check the fair-price-by-mileage table above for your band.
Do Mercedes Benz C Class prices in Illinois differ from the rest of the country?
Yes. The average in Illinois is $23,923, which is $3,140 above the national average of $20,783. Local supply, demand and transport costs all play a part.
How many 2018 Mercedes Benz C Class are for sale in Illinois right now?
30 in total, nearly all pre-owned. Counts refresh daily from live dealer inventory.
How we calculate these prices
We track 30 active listings for this vehicle across dealer sites nationwide, updated every day. Average and median are computed from real asking prices on live listings. We exclude the top and bottom 2% of prices to remove data errors, salvage titles, and monthly-payment figures posted as if they were sale prices. Prices reflect dealer asking prices — not final sale prices — and exclude taxes, fees, and incentives. Trim and mileage move the price more than any other factor; see the breakdowns above.
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