The SL43 is the smaller-engined SL. Its road tax is modest for a car at this price, because road tax follows engine size. Its insurance is a different story. This guide takes each figure in turn, for anyone weighing one up.
All insurance figures are examples for one stated driver, as of 1 November 2026. Use them to compare, not as your price.
Versions
The new-car list read on 2026-10-10 shows one version, listed as a sports body made in Germany:
- SL43 AMG Touring Plus: petrol, 1,991cc, 381bhp
The quote form has four:
- SL43 AMG: 1,991cc
- SL43 AMG Premium Plus: 1,991cc
- SL43 AMG Touring Plus: 1,991cc
- SL55 AMG 4MATIC + Premium Plus: 3,982cc
The insurance figures are for the SL43 AMG Premium Plus, the version most insurers quote.
List price as listed
On 2026-10-10 the SL43 AMG Touring Plus was listed at S$768,900, including COE that day. Ask for a current figure, as prices move after COE rounds. Check that offers you compare include the same items.
COE
With a 1,991cc engine, above 1,600cc, the price page puts the SL43 AMG Premium Plus in Category B. Category B closed at S$131,901 in the October 2026 2nd round. The COE page has newer results.
Road tax for 1,991cc
LTA's formula, checked 2026-10-19, gives S$1,201.54 a year for a 1,991cc engine, before any age surcharge. All three SL43 versions share that figure. The SL55 on the form pays far more; the road tax page works it out.
The age surcharge:
- Over 10 years: +10%
- Over 11 years: +20%
- Over 12 years: +30%
- Over 13 years: +40%
- Over 14 years: +50%
Insurance: higher than the engine suggests
The Mercedes-Benz SL-Class Cabriolet price page prices these details:
- Car: SL43 AMG Premium Plus, registered 3 years ago, private use, comprehensive cover
- Driver: aged 40, married, office job, driving 10 years
- Record: 50% no-claim discount (NCD), no claims
- Repairs: authorised workshop, no options
4 insurers price it, across 10 plans. The lowest is S$2,068.07 a year, marked as an estimate. The dearest insurer asks at least S$5,081.90 for its lowest plan. That is S$3,013.83 more, or 146% on top. The top plan is S$7,064.30. All prices include 9% GST.
The plans fall into two clear groups. Seven run from S$2,068.07 to S$2,728.15, all estimates. The other three come from one insurer and start at S$5,081.90. If you look only at the dearest insurer, you would see a very different picture from the lower group. That is why comparing several insurers matters so much on this car.
Fifteen insurers show no online price for this model.
Excess in two groups as well
- S$600: on six of the seven lower plans
- S$1,500: on the seventh
- S$300: on the three dearest plans
So the dearest plans pair the lowest excess with a much higher premium. On the lower group, the excess is the same on most plans, which makes those easy to compare on price.
The price for other drivers
The page shows the lowest price when one detail changes:
- No NCD (0%): S$4,136.12, or S$2,068.05 more
- 20% NCD: S$3,308.90, or S$1,240.83 more
- Driver aged 27, 3 years' driving, 30% NCD: S$2,895.29, or S$827.22 more
- Driver aged 65, 20 years' driving, 50% NCD: S$2,068.07, the same
- A new car, registered this year: S$2,068.07, the same
- A car 8 years old: S$2,068.07, the same
NCD drives everything here. With no NCD, the lowest price doubles, a rise of 100%. The young driver pays less than that, because of the 30% NCD. The older driver and the car's age make no difference to the lowest figure.
Protecting your NCD
Since NCD carries so much weight on this car, ask whether a plan offers NCD protection, and at what cost. Ask too what counts as a claim against it, such as a windscreen repair. These details can be worth more than a small gap in premium.
Against similar cars
For the same driver and car age, the price page lists six cars:
- Toyota Harrier: S$763.00
- BMW 5 Series: S$792.38
- Toyota Voxy: S$763.41
- Lexus NX: S$970.26
- Lexus RX: S$921.75
- BMW 3 Series: S$1,000.41
Their average lowest price is S$868.54. The SL-Class Cabriolet is 138% above it, and all 6 are cheaper to insure. These rivals are matched on engine size, not on price or type. That explains much of the gap. The Mercedes-Benz car insurance page has the maker's other models.
Costs to estimate yourself
- Parking: a covered lot may suit a soft-top; check season parking at home and work.
- Petrol: your mileage and pump prices set the bill.
- ERP: depends on your routes and timing.
- Servicing and tyres: ask what the warranty covers, including the roof mechanism.
- Depreciation: tied to what you pay and what the car fetches later.
Summary of yearly costs we can show
For the SL43 AMG Premium Plus, 1,991cc:
- Road tax: S$1,201.54 a year before any age surcharge (LTA's formula, checked 2026-10-19)
- Insurance, standard driver: from S$2,068.07 a year, an estimate (1 November 2026)
- Insurance, no NCD: from S$4,136.12
- Insurance, driver aged 27: from S$2,895.29
One-off costs for reference: S$768,900 for the SL43 AMG Touring Plus as listed on 2026-10-10, COE included. Category B closed at S$131,901 in the October 2026 2nd round.
Before you buy: car insurance for the Mercedes-Benz SL-Class Cabriolet
Before you drive off, get your car insurance through Shenton Brokers. Compare car insurance for the Mercedes-Benz SL-Class Cabriolet 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.