How much does a used Mercedes SL400 cost? Prices, ratings and depreciation by model year
Model year	Price range*	Avg. Price	Median Mileage	Depreciation (12 mth.)	Cars for sale
2018 Mercedes SL400	£29,087 - £40,890	£36,286	34,000 miles	-	< 10
2017 Mercedes SL400	£28,553 - £34,891	£32,311	55,000 miles	-	< 10
2015 Mercedes SL400	£18,828 - £25,725	£22,374	57,000 miles	-	< 10

*The 'Price range' column shows the prices at the 5th and 95th percentiles of cars in the current market

The data is based on the cars currently listed on AutoUncle

Last updated: 14 July 2026

Comparison of Mercedes SL400 variants and prices
Variant	Price range*	Avg. Price	Median Mileage	Depreciation (12 mth.)	Cars for sale
Mercedes SL400 AMG line	£28,855 - £39,244	£34,232	44,500 miles	-	< 10
Mercedes SL400 AMG Line Premium	£28,466 - £40,269	£34,216	47,700 miles	-	< 10
💰 The budget choice Mercedes SL400 AMG	£18,995 - £26,047	£22,636	54,300 miles	+£2,360	11

*The 'Price range' column shows the prices at the 5th and 95th percentiles of cars in the current market

The data is based on the cars currently listed on AutoUncle

Last updated: 14 July 2026

The AMG is the cheapest entry point with an average price of £22,636.

There are the most AMG for sale right now (11), which gives you the most options to choose from.

The AMG has held its price stable with minimal loss in value over the past year (+£2,360).

Price checked by AutoUncle

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Mercedes SL400 in Eastbourne • 1 cars with AutoUncle Valuation