A Mercedes-Benz 300S is a big-engined car, and in Singapore a big engine shows up in two places: road tax and the COE category. This guide walks you through both, then through car insurance. It is written for owners and for anyone weighing a used one.
Insurance prices here are examples for one stated driver, as of 1 November 2026. Treat them as a guide to how insurers line up, not as your price.
What the price page has, and what it lacks
The new-car list has no entry for the 300S on sale now. That means no list price, no power figure and no body type in this guide. The price page instead gives the engine size, the COE rule and a set of insurance prices.
It prices the 300S with a 2,997cc engine, the version most of its insurers quote. Every figure that follows is for that car.
Road tax: the biggest fixed bill
Road tax in Singapore climbs with engine size. For 2,997cc, LTA's formula, checked 2026-10-19, gives S$2,381.58 a year. That is before any surcharge for age.
On an older car, the surcharge can add a good deal:
- Over 10 years: +10%
- Over 11 years: +20%
- Over 12 years: +30%
- Over 13 years: +40%
- Over 14 years: +50%
Look at the registration date before you agree a price. The surcharge is charged every year on top of the base sum. The road tax page does the sum for other engines.
The COE category
With a 2,997cc engine, well above 1,600cc, the 300S needs a Category B COE. That category closed at S$131,901 in the October 2026 2nd round.
For a used car, the more useful number is the time left on its current COE. Ask for it, and think about what happens when it ends. The COE page carries the latest round.
Car insurance for the standard driver
The Mercedes-Benz 300S price page prices a single profile:
- The car: 300S, registered 3 years ago, private use, comprehensive cover
- The driver: aged 40, married, office job, 10 years of driving
- The record: 50% no-claim discount (NCD) and no claims
- Repairs: authorised workshop, no options
Only 4 insurers price it online, with 5 plans between them. The lowest is S$886.98 a year. The dearest insurer asks at least S$1,788.17. That is S$901.19 more, or 102% on top of the lowest. All prices include 9% GST.
Fifteen insurers show no online price for this model. With so few prices to compare, it may be worth asking for quotes directly too. Two of the five plans are marked as estimates.
Excesses on the page
The excess is what you pay towards each claim. Here it runs from S$600 on the lowest premium up to S$3,000 on the highest. The middle plans sit at S$800 and S$1,200. In this case the lower premium also has the lower excess, which is not always so.
How the lowest price moves
The page's second table changes one detail at a time:
- No NCD (0%): S$1,733.95, or S$846.97 more
- 20% NCD: S$1,388.02, or S$501.04 more
- Driver aged 27, 3 years' driving, 30% NCD: S$1,813.99, or S$927.01 more
- Driver aged 65, 20 years' driving, 50% NCD: S$969.28, or S$82.30 more, with 3 insurers pricing
- A new car, registered this year: S$913.66, or S$26.68 more, with 3 insurers pricing
- A car 8 years old: S$844.26, or S$42.72 less
The young driver costs most, at 105% above the standard figure. Having no NCD nearly doubles the price too. An 8-year-old car brings the lowest price down a little.
Remember that these are lowest prices. Plans higher up may shift by different sums.
Similar cars on the price page
For the same driver and car age, here are the six cars the page compares:
- Alfa Romeo 166: S$2,897.48, from 2 insurers
- Audi A8: S$1,092.69, from 11 insurers
- Audi Q7: S$1,002.60, from 14 insurers
- Audi Q8: S$1,323.18, from 8 insurers
- Audi Roadjet Concept: S$1,524.39, from 1 insurer
- Audi S4 Saloon: S$1,209.34, from 8 insurers
Their average lowest price is S$1,508.28. The 300S costs 41% less than that, and none of the six is cheaper to insure on these details. Keep in mind the 300S has far fewer insurers pricing it, so your choice of plan is narrower. Other models from the maker are on the Mercedes-Benz car insurance page.
Costs you set yourself
These depend on how and where you use the car:
- Parking: your season parking at home, plus work and weekend trips.
- Petrol: a larger engine generally uses more, but your distance matters most.
- ERP: set by your routes and timing.
- Servicing: an older car can need more parts. Ask for the records before you buy.
- Depreciation: tied to what you pay and how much COE life remains.
Summary of yearly costs we can show
For the 300S with a 2,997cc engine:
- Road tax: S$2,381.58 a year before any age surcharge (LTA's formula, checked 2026-10-19)
- Insurance, standard driver: from S$886.98 a year (1 November 2026)
- Insurance, no NCD: from S$1,733.95
- Insurance, driver aged 27: from S$1,813.99
- Insurance, car 8 years old: from S$844.26
The Category B COE closed at S$131,901 in the October 2026 2nd round. No list price is given, as the model is not on the new-car list.
Before you buy: car insurance for the Mercedes-Benz 300S
Before you drive off, get your car insurance through Shenton Brokers. Compare car insurance for the Mercedes-Benz 300S to see today's prices from every insurer we compare and how they change with the driver and the car's age. Or get a quote with your own details.