2004 Mercedes Benz Sl Class prices in Illinois
The median asking price for a 2004 Mercedes Benz Sl Class in Illinois is $19,995 based on 5 active listings.
As of July 26, 2026, the median asking price for a 2004 Mercedes Benz Sl Class in Illinois is $19,995, based on 5 active dealer listings tracked by VinAssessment.
◷ Updated July 26, 2026 ▤ 5 active dealer listings, refreshed daily Methodology →
Typical: $11,999–$22,373 — the middle half of 5 asking prices
Why the wide range? 2004 Mercedes Benz Sl Class listings span two distinct versions: the SL500 (typically $12K–$17K) and the AMG SL55 ($20K–$27K). See price by trim. 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 2004 Mercedes Benz Sl Class
The $11,999–$22,373 typical range isn't randomness — two factors explain most of it:
Asking prices run about $24,995 at 15K–30K miles and fall to $10,997 over 105K miles — roughly $1,600 for every 10,000 miles.
The SL500 typically asks $14,188, while the AMG SL55 asks $22,373 — same year, same market.
Find your mileage and trim in the configurator below.
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Modelled from 63 real asking prices, adjusted for mileage and location. Not a formal appraisal.
2004 Mercedes Benz Sl Class: a fair price for your mileage
A 2004 Mercedes Benz Sl Class sheds roughly $1,600 for every 10,000 miles. Find your mileage below.
Fair price by mileage and trim
| Mileage | All listings | SL500 | AMG SL55 |
|---|---|---|---|
| 15K–30K miles | $24,995 | $21,990 | — |
| 30K–45K miles | $18,000 | $17,995 | — |
| 45K–60K miles | $16,950 | $14,361 | $26,475 |
| 60K–75K miles | $14,248 | $13,995 | $20,998 |
| 75K–90K miles | $14,200 | $12,499 | $18,998 |
| 90K–105K miles | — | $9,890 | — |
| Over 105K miles | $10,997 | $9,995 | — |
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 ⓘ |
|---|---|---|---|
| 15K–30K miles | 7 listings | $24,995 | $20K–$29K |
| 30K–45K miles | 11 listings | $18,000 | $17K–$21K |
| 45K–60K miles | 20 listings | $16,950 | $14K–$21K |
| 60K–75K miles | 14 listings | $14,248 | $13K–$17K |
| 75K–90K miles | 14 listings | $14,200 | $11K–$16K |
| Over 105K miles | 12 listings | $10,997 | $8,956–$15K |
Same trim and condition assumed — mileage is the biggest lever after configuration. These figures blend both versions — see the price-by-trim split below for your version's range. National data; Illinois prices track it closely.
2004 Mercedes Benz Sl Class: price by trim
| Trim | Based on ⓘ | Median price ⓘ | Typical range ⓘ | Where it sits ⓘ |
|---|---|---|---|---|
| SL500 | 63 listings | $14,188 | $12K–$17K | |
| AMG SL55 | 15 listings | $22,373 | $20K–$27K |
Based on a small number of listings per trim — medians are indicative, not definitive. 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 2004 Mercedes Benz Sl Class is $14,995 (July 2026) — down 14.1% from $17,448 in July 2025.
Monthly price table
| Month | Median price | Typical range | Vehicles listed |
|---|---|---|---|
| July 2026 | $14,995 | $11K–$20K | 51 |
| June 2026 | $14,725 | $10K–$20K | 61 |
| May 2026 | $15,846 | $11K–$21K | 56 |
| April 2026 | $14,500 | $9,999–$19K | 49 |
| March 2026 | $14,851 | $12K–$20K | 54 |
| February 2026 | $15,990 | $12K–$21K | 52 |
| January 2026 | $13,995 | $11K–$19K | 65 |
| December 2025 | $13,787 | $9,998–$20K | 53 |
| November 2025 | $14,500 | $12K–$18K | 45 |
| October 2025 | $13,900 | $10K–$18K | 35 |
| September 2025 | $12,806 | $11K–$16K | 22 |
| August 2025 | $15,000 | $11K–$20K | 25 |
| July 2025 | $17,448 | $13K–$20K | 10 |
2004 Mercedes Benz Sl Class inventory across the U.S.
Keep exploring Sl Class prices
2004 Mercedes Benz Sl Class · $19,115 typical · 5 listingsOther Mercedes Benz Sl Class years
Live 2004 Mercedes Benz Sl Class listings, priced by VIN
Every VIN links to a full market report: decode, active listings and the local price band. Shop 2003–2005 Mercedes Benz Sl Class listings on VehiSales →.
More 2004 Mercedes Benz prices
Frequently asked questions
Why do 2004 Mercedes Benz Sl Class prices range from $11,075 to $29,585 in Illinois?
The spread is two different cars sharing one name. 2004 Mercedes Benz Sl Class listings span two distinct versions: the SL500 (typically $12K–$17K) and the AMG SL55 ($20K–$27K). Within each version, mileage and options set where a specific car lands.
How much should mileage change the price of a 2004 Mercedes Benz Sl Class?
Expect roughly $1,600 less for every 10,000 miles on the odometer. A 60K-mile example should cost about $4,800 less than a 30K-mile one of the same trim — check the fair-price-by-mileage table above for your band.
Do Mercedes Benz Sl Class prices in Illinois differ from the rest of the country?
Yes. The average in Illinois is $19,115, which is $2,276 above the national average of $16,839. Local supply, demand and transport costs all play a part.
How many 2004 Mercedes Benz Sl Class are for sale in Illinois right now?
5 in total, nearly all pre-owned. Counts refresh daily from live dealer inventory.
How we calculate these prices
We track 5 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.
Want the original factory equipment and MSRP behind a specific car? See the factory window sticker for this Sl Class →
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Check individual VINs before you buy — decode the exact trim and mileage, see every active listing, and how each price compares to the local market.