2018 Mercedes S Class engine computer — electronic control module, 231 Type (SL models), SL550 price snapshot
- Low
- $99
- Average
- $197
- High
- $323
Year & trim-specific price guide
Used 2018 Mercedes S Class Engine Computer — electronic control module, 231 Type (SL models), SL550 prices
Trim-specific pricing for the electronic control module, 231 Type (SL models), SL550 variant of the 2018 Mercedes S Class engine computer, built from 9 real salvage yard listings with condition grade detail.
SKWritten bySaurabh Kumar · Co-Founder & CTO
SK
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.
ASReviewed byAmbika Sharma · Co-Founder & COO
Last updatedOct 8, 2026AS
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 summary
A used 2018 Mercedes S Class engine computer (electronic control module, 231 Type (SL models), SL550) costs $99 to $323, with a median asking price of $200. Based on 9 priced salvage yard listings across the US, updated Oct 8, 2026. Prices exclude shipping, core charges, and installation.
Grade A (excellent)$200
Grade B (good)$200
USD
Condition comparison
Price by part grade
Grade AClean / low wear$99–$3238 listings
Grade BStandard used$200–$2001 listings
| Grade | Price range | Relative range | Listings |
|---|---|---|---|
| Grade AClean / low wear | $99–$323 | 8 | |
| Grade BStandard used | $200–$200 | 1 |
Median by grade
Grade price comparison
Grade A$200
Grade B$200
Median asking price by seller-reported condition grade · $99–$323 overall range
Trim-specific context
How does the electronic control module, 231 Type (SL models), SL550 compare?
This pricing covers the electronic control module, 231 Type (SL models), SL550 variant of the 2018 Mercedes S Class engine computer, based on 9 priced listings. Its $200 median is 38% below the 2018 Mercedes S Class engine computer overall median of $323.
There are 12 other engine computer variants available for the 2018 Mercedes S Class.
Pricing is not a fitment guarantee. Match the VIN, part number, engine or drivetrain, and seller-listed variant before ordering.
Same trim, other years
electronic control module, 231 Type (SL models), SL550 in other model years
Same year, other trims
What other 2018 Mercedes S Class engine computer variants are available?
electronic control module, 231 Type (SL models), SL450
36 listings$150$44 – $300electronic control module, 217 Type (S models, coupe and convertible), S63
31 listings$875$510 – $1,037electronic control module, 222 Type (S models, sedan), S63
30 listings$875$510 – $1,037electronic control module, 217 Type (S models, coupe and convertible), S560
28 listings$301$225 – $799electronic control module, 222 Type (S models, sedan), S450, ID 2769007500
23 listings$200$110 – $400electronic control module, 222 Type (S models, sedan), S560
9 listings$295$230 – $500electronic control module, 222 Type (S models, sedan), S560 Maybach
9 listings$295$230 – $500electronic control module, 231 Type (SL models), SL63
9 listings$200$99 – $323electronic control module, 231 Type (SL models), SL65
9 listings$350$120 – $350electronic control module, 217 Type (S models, coupe and convertible), S65
7 listings$524$420 – $608electronic control module, 222 Type (S models, sedan), S65
7 listings$524$420 – $608electronic control module, 222 Type (S models, sedan), S450, ID 2769004901
1 listings$325$325 – $325Back to full guide
2018 Mercedes S Class engine computer — all trims
Common questions
2018 Mercedes S Class engine computer (electronic control module, 231 Type (SL models), SL550) FAQ
How much is a used 2018 Mercedes S Class engine computer (electronic control module, 231 Type (SL models), SL550)?
Based on 9 priced salvage-yard listings, a used 2018 Mercedes S Class engine computer in the electronic control module, 231 Type (SL models), SL550 variant lists between $99 and $323, with a median asking price of $200.
Which years use the electronic control module, 231 Type (SL models), SL550 engine computer?
The electronic control module, 231 Type (SL models), SL550 variant appears in model years 2017, 2018, 2019, 2020. Prices and availability may differ by year.