Mercedes SL320 Valuation: 38 used car listings analysed

Featured deals

Verified Dealers

Become a verified dealer

autouncle-certified

Price checked by AutoUncle

Super price

Good price

Fair price

A bit pricey

Expensive

Showing 1 - 25 of 37 results

How much does the Mercedes SL320 depreciate?

Used Mercedes SL320

A used Mercedes SL320 (1998) model loses about £42 per month in value.


Factors that affect the depreciation of a Mercedes SL320:
- Mileage driven
- Maintenance
- Service history


Depreciation is an important part of calculating the total cost of owning a Mercedes SL320. In addition to the monthly depreciation of £42, you should also factor in fuel costs, road tax, insurance and maintenance (including tyres and car washes) to get the full monthly cost.

Comparison of Mercedes SL320 variants and prices

Below you can compare prices and depreciation for the 1 most popular Mercedes SL320 variants. The table is updated daily with data from the market in United Kingdom.

Comparison of Mercedes SL320 variants and prices

Variant

Price range*

Avg. Price

Median Mileage

Depreciation
(12 mth.)

Cars for sale

💰 The budget choice

Mercedes SL320 Edition

£12,500 - £21,995£16,61988,200 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

Which variant should you choose?

💰 The budget choice

The Edition is the cheapest entry point with an average price of £16,619.

Accuracy will improve as more cars from this variant become available

🏆 The most popular

There are the most Edition for sale right now (4), which gives you the most options to choose from.

Accuracy will improve as more cars from this variant become available

Mercedes SL320 (model year 1998) - Price development for the last 12 months and price projection for the next 6 months (June 2025 - November 2026)

Monthly price data with average prices and price ranges

Month

Average market price

Lowest market price

Highest market price

Calculation method

2025 - June
£8,020
£5,100£10,960
Estimate
2025 - July
£8,000
£5,120£10,860
Estimate
2025 - August
£7,980
£5,220£10,760
Estimate
2025 - September
£7,940
£5,300£10,580
Estimate
2025 - October
£8,160
£5,480£10,840
Estimate
2025 - November
£8,060
£5,560£10,560
Estimate
2025 - December
£7,660
£5,440£9,880
Estimate
2026 - January
£7,580
£5,420£9,740
Estimate
2026 - February
£7,520
£5,400£9,620
Estimate
2026 - March
£7,440
£5,380£9,500
Estimate
2026 - April
£7,360
£5,360£9,380
Estimate
2026 - May
£7,520
£5,460£9,580
Estimate
2026 - July
£7,460
--
Forecast
2026 - August
£7,440
--
Forecast
2026 - September
£7,400
--
Forecast
2026 - October
£7,380
--
Forecast
2026 - November
£7,360
--
Forecast

All estimates and forecasts are based on actual market data

Average Monthly Depreciation

A summary of the past 12 and an estimation of the next 6 months.

Past 12 months

-£500

Next 6 months

-£160

autouncle-certified

Price checked by AutoUncle

Super price

Good price

Fair price

A bit pricey

Expensive

Thinking about buying a used Mercedes SL320?

Are you interested in buying a used sports car? Look no further than the Mercedes SL320 - an excellent choice! There are 33 used Mercedes SL320s currently available on AutoUncle collected from numerous dealership websites and online marketplaces.

What is the used car price of the Mercedes SL320?

Currently, the prices for a pre-owned Mercedes SL320 start at £3,695 and go up to £22,950.

There exist five primary parameters that decides what a used Mercedes SL320 costs: production year, engine capacity and performance, fuel efficiency, how far the car has already travelled and equipment.

For example, a younger car with fewer miles on the odometer will generally have a higher price. Similarly, higher-end models with more luxurious features or more powerful engines tend to come with a higher price tag than a used model with many kilometres on the odometer and in a simple equipment variant.

What are the available trim levels for the Mercedes SL320?

The Mercedes SL320 is only available in one trim level, the Mercedes SL320 Edition.

As you considers the cost of a used Mercedes SL320, it's fundamental to examine vehicles sharing identical trim level. If not, you might draw an inaccurate conclusion about which car to buy.

Which fuel types does the Mercedes SL320 come with?

The Mercedes SL320 is solely available with a single fuel option, petrol. We have thirty-three cars in the range right now at an average price of £8,564.

Before deciding on a fuel type to buy, we highly recommend taking some time to consider your current driving habits. Do you only use your car to get to and from work? Is the distance less than roughly 35 miles each way?

If you primarily drive short distances, electric, plug-in hybrid or petrol is typically a good fit. For longer commutes, a newer electric car is a good alternative - especially with access to charging. For longer daily commutes, a modern electric car is often suitable - especially if you can charge at home or at work. If you often drive long distances and can't charge, diesel can still be a viable option. Be aware that in a number of countries, cities have implemented bans on diesel engines with high emissions.

Are there more body variants of Mercedes SL320?

The Mercedes SL320 is only offered in the cabriolet body type in the UK. Cabrios and convertibles are a great way to add another dimension to the driving experience. Today, most cabrios can be driven year-round as the majority of models have really good hoods and weather gear. Beware that convertibles are typically heavier than normal cars. Because of the lack of roof, thickener is applied underneath the car to strengthen the chassis.

What are the obvious alternatives in the same class as the Mercedes SL320?

The Mercedes SL320 has multiple competitors from the same segment.

Alternative cars to the Mercedes SL320

  • BMW 420
  • Audi TT
  • Mazda MX5

A commonly preferred option to the Mercedes SL320 is the BMW 420. It has an average sales price of £18,198 and right now you can find 1,491 of this car for sale on AutoUncle.

The Audi TT is another popular pick, with 949 cars currently for sale and an average price of £13,199. The Mazda MX5 is the third best alternative. There are currently 556 of this car for sale in the UK with an average sales price of £15,000.

Considering the idea of going electric with your next car?

Not fixed on the Mercedes SL320? Here are some electric options in the same segment::

Didn't find an electric car to your liking? Examine our full lineup of electric cars here.

See Mercedes