Used Mercedes-Benz 300 Price Guide

The Mercedes-Benz 300 represents a range of prestigious models spanning decades, from the classic W186 to modern variants of the E-Class and S-Class bearing the 300 designation. With approximately 200 listings currently available across the UK, prices typically range from £9,000 for older high-mileage examples to £60,000 for newer, low-mileage models in exceptional condition.

Market Summary

Price range
£9,000 – £60,000

Total listings
200

Most common year
2020

Most common fuel
Petrol

Mercedes-Benz 300 Prices by Year

Year	Min Price	Avg Price	Max Price
2022	£45,000	£52,000	£60,000
2020	£35,000	£41,000	£48,000
2018	£24,000	£29,500	£36,000
2016	£15,000	£19,500	£25,000
2014	£9,000	£12,500	£17,000

Average Price by Fuel Type

Diesel

£28,500

Petrol

£33,500

Hybrid

£39,500

Average Price by Mileage

Mileage	Average Price
N/A miles	£45,500
N/A miles	£32,500
N/A miles	£22,000
N/A miles	£14,500

About the Mercedes-Benz 300

The Mercedes-Benz 300 nomenclature has been applied to various models throughout the manufacturer's history, most commonly referring to 3.0-litre engine variants of the E-Class (E300) and S-Class (S300). Modern examples typically feature turbocharged diesel or petrol engines delivering between 245-367bhp, paired with nine-speed automatic transmissions. These executive and luxury saloons offer premium build quality, advanced safety technology, and refined driving dynamics. The E300 serves as a popular choice in the business car segment, whilst the S300 represents flagship luxury motoring.

What Affects the Price

Year of manufacture significantly impacts values, with 2019-onwards models commanding premium prices due to updated styling and technology. Mileage remains crucial—examples under 30,000 miles attract considerable premiums, whilst those exceeding 100,000 miles typically sell for 40-50% less. Specification levels matter greatly; AMG Line trim, Premium Plus packages, and desirable options like panoramic sunroofs, Burmester sound systems, and driver assistance packs add substantial value. Service history is paramount—full Mercedes-Benz main dealer history commands higher prices than independent servicing. Fuel type affects pricing, with diesel variants historically popular but recent market shifts favouring petrol and mild-hybrid versions. Condition of wear items, particularly air suspension components and interior leather, directly impacts valuations.

Buying Tips

Verify complete service history with stamps or digital records, prioritising main dealer maintenance for newer examples. Inspect air suspension systems thoroughly—listen for compressor noise and check for uneven ride height, as repairs exceed £2,000. Examine the interior carefully for wear on leather bolsters and steering wheel trim, which are expensive to refurbish. Test all electronic systems including COMAND/MBUX infotainment, cameras, and driver aids, as faults can be costly to rectify. Check for oil leaks around the engine, particularly from cam cover gaskets on petrol models. Request evidence of AdBlue system servicing on diesel variants to avoid future emission system issues. Consider approved used schemes offering extended warranties, as repair costs for complex systems can be substantial. Review MOT history for advisory notices relating to suspension and braking components.

Frequently Asked Questions

Used Mercedes-Benz 300 models typically range from £9,000 to £60,000 in the UK, depending on age, mileage, and specification. Older models from 2015-2017 with higher mileage start around £9,000-£18,000, whilst 2020-2022 examples with low mileage command £40,000-£60,000. Average prices sit around £28,000-£35,000 for well-maintained 2018-2020 models with moderate mileage.

Models from 2019 onwards offer the best balance of modern technology, updated styling, and remaining warranty coverage, though they command premium prices. The 2017-2018 facelift models represent excellent value, featuring most current safety systems and infotainment whilst being significantly cheaper. Avoid very early examples (pre-2016) unless seeking budget options, as technology and efficiency have improved markedly.

Air suspension issues are the most common concern, with compressor failures and airbag leaks costing £1,500-£2,500 to repair. Diesel models can experience AdBlue system faults and DPF problems if used for short journeys. Electrical gremlins affecting infotainment, parking sensors, and driver assistance systems occasionally occur. Oil leaks from cam cover gaskets affect some petrol variants. Ensure comprehensive service history to minimise risk of expensive repairs.

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