Mercedes S Class alternator — 231 Type (SL models), SL550 price snapshot
- Low
- $86
- Average
- $189
- High
- $365
Trim-specific price guide
Mercedes S Class Alternator — 231 Type (SL models), SL550 prices
Pricing for the 231 Type (SL models), SL550 variant of the Mercedes S Class alternator, aggregated from 195 salvage yard listings across 4 model years.
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 13, 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 Mercedes S Class alternator (231 Type (SL models), SL550) costs $86 to $365, with a median asking price of $171. Based on 195 priced salvage yard listings across the US, updated Oct 13, 2026. Prices exclude shipping, core charges, and installation.
Grade A (excellent)$176
Grade B (good)$150
USD
Condition comparison
Price by part grade
Grade AClean / low wear$90–$365182 listings
Grade BStandard used$86–$23713 listings
| Grade | Price range | Relative range | Listings |
|---|---|---|---|
| Grade AClean / low wear | $90–$365 | 182 | |
| Grade BStandard used | $86–$237 | 13 |
Median by grade
Grade price comparison
Grade A$176
Grade B$150
Median asking price by seller-reported condition grade · $86–$365 overall range
Trim-specific context
How is the 231 Type (SL models), SL550 priced differently?
This pricing covers the 231 Type (SL models), SL550 variant of the Mercedes S Class alternator, based on 195 priced listings across 4 model years (2017, 2018, 2019, 2020). Its $171 median is 15% below the Mercedes S Class alternator overall median of $202.
Pricing is not a fitment guarantee. Match the VIN, part number, engine or drivetrain, and seller-listed variant before ordering.
Price by model year
What does a 231 Type (SL models), SL550 cost by year?
Other trims
Other Mercedes S Class alternator variants
217 Type, (Cpe), S550
2 yrs$175$73 – $450217 Type, (Cpe), S63
2 yrs$649$300 – $788217 Type (S models, coupe and convertible), S550
1 yr$135$100 – $450217 Type (S models, coupe and convertible), S560
4 yrs$166$73 – $350217 Type (S models, coupe and convertible), S63
5 yrs$575$300 – $788222 Type (S models, sedan), S550
1 yr$135$100 – $450222 Type (S models, sedan), S550 Maybach
1 yr$135$100 – $450222 Type (S models, sedan), S560
3 yrs$182$85 – $299222 Type (S models, sedan), S560 Maybach
3 yrs$182$85 – $299Common questions
Mercedes S Class alternator (231 Type (SL models), SL550) FAQ
How much is a used Mercedes S Class alternator (231 Type (SL models), SL550)?
Based on 195 priced salvage-yard listings across 4 model years, a used Mercedes S Class alternator in the 231 Type (SL models), SL550 variant lists between $86 and $365, with a median asking price of $171.
Which Mercedes S Class years use the 231 Type (SL models), SL550 alternator?
The 231 Type (SL models), SL550 variant appears in model years 2017, 2018, 2019, 2020. Prices and availability differ by year.
Is there a price difference between 231 Type (SL models), SL550 condition grades?
Yes. Grade A has a median of $176, Grade B has a median of $150. Grade A parts are in excellent condition, B is good, and C is fair.