The SL Cabriolet is a two-door soft-top with a large engine. In Singapore, that engine sets a high road tax bill. Insurance comes from very few insurers online. This guide sets out each figure for anyone looking at the SL55.
The insurance figures are examples for one stated driver, as of 1 November 2026. They are for comparing, not your quote.
Versions
The new-car list read on 2026-10-10 shows one version, listed as a sports body made in Germany:
- SL55 AMG 4MATIC+: petrol, 3,982cc, 476bhp
The quote form has three:
- SL43 AMG: 1,991cc
- SL55 AMG 4MATIC+: 3,982cc
- SL63 AMG 4MATIC+: 3,982cc
The insurance figures here are for the SL55 AMG 4MATIC+, the version most insurers quote.
List price
As listed on 2026-10-10, the SL55 AMG 4MATIC+ was S$1,044,888, COE included that day. At this level, what an offer includes can vary a great deal. Compare offers item by item, and expect the figure to move after COE rounds.
COE
With its 3,982cc engine above 1,600cc, the SL55 needs a Category B COE, on the price page's reading. Category B closed at S$131,901 in the October 2026 2nd round. See the COE page for later results.
Road tax: a heavy yearly item
For a 3,982cc engine, LTA's formula, checked 2026-10-19, gives S$3,920.94 a year, before any age surcharge. The SL63 shares the engine size, so it pays the same. The SL43's much smaller engine pays far less; the road tax page works it out.
Once the car is over 10 years old:
- Over 10 years: +10%
- Over 11 years: +20%
- Over 12 years: +30%
- Over 13 years: +40%
- Over 14 years: +50%
Insurance: two prices, far apart
The Mercedes-Benz SL Cabriolet price page prices these details:
- Car: SL55 AMG 4MATIC+, 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
2 insurers price it, one plan each. The lower is S$1,418.33 a year. The other is S$3,055.53, marked as an estimate. That is S$1,637.20 more, or 115% on top. Both include 9% GST.
Seventeen insurers show no online price. One of them prices electric cars only online. With two prices so far apart, asking more insurers may show where the market really sits.
Read the excess too
- S$1,418.33 plan: S$2,500 excess
- S$3,055.53 plan: S$1,500 excess
The lower premium carries the higher excess. A single claim would narrow the gap between the two, though the yearly difference is still large. Weigh what you pay each year against what a claim would cost you.
What changes the price
The page shows the lowest price when one detail changes:
- No NCD (0%): S$2,666.06, or S$1,247.73 more
- 20% NCD: S$2,151.16, or S$732.83 more
- Driver aged 27, 3 years' driving, 30% NCD: S$2,850.11, or S$1,431.78 more
- Driver aged 65, 20 years' driving, 50% NCD: S$1,603.27, or S$184.94 more
- A new car, registered this year: S$1,430.03, or S$11.70 more
- A car 8 years old: S$1,236.28, or S$182.05 less
The younger driver sees the biggest jump, at 101% above the standard figure. No NCD is close behind. An 8-year-old car is the one change that brings the price down by a useful amount.
A second car
A car like this is often a second car in the household. NCD usually sits with one car, so check which car your NCD is on. If this one would start with less NCD, the table above gives a sense of what that costs.
Versions and the price
The page prices the SL55 because most insurers quote it. The SL63 shares its engine size but sits higher in the range, and the SL43 has a much smaller engine. Insurers may price each differently. When you ask for a quote, give the exact version from the car's papers, so the figure matches your car.
Against similar cars
For the same driver and car age, the price page compares six cars:
- Audi RS Q8: S$2,154.12
- Audi SQ7: S$2,154.12
- Audi SQ8: S$1,370.00
- BMW 735i: S$1,061.44
- BMW 735Li: S$1,061.44
- BMW M5 Sedan: S$3,485.71
Their average lowest price is S$1,881.14. The SL Cabriolet is 25% below it. Three of the six are cheaper to insure: the SQ8 and the two BMW 7 Series versions. The Mercedes-Benz car insurance page has the maker's other models.
Costs that depend on you
- Parking: a covered lot may matter more with a fabric roof. Check season parking at home and work.
- Petrol: a large petrol engine; your mileage sets the bill.
- ERP: depends on your routes and the hour.
- Tyres and servicing: performance parts can cost more. Ask what the warranty covers, including the roof.
- Depreciation: on a list price above a million dollars, the fall in value can be large. It turns on what you pay and what the car fetches later.
Summary of yearly costs we can show
For the SL55 AMG 4MATIC+:
- Road tax: S$3,920.94 a year before any age surcharge (LTA's formula, checked 2026-10-19)
- Insurance, standard driver: from S$1,418.33 a year (1 November 2026)
- Insurance, no NCD: from S$2,666.06
- Insurance, driver aged 27: from S$2,850.11
- Insurance, car 8 years old: from S$1,236.28
One-off costs for reference: S$1,044,888 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 Cabriolet
Before you drive off, get your car insurance through Shenton Brokers. Compare car insurance for the Mercedes-Benz SL 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.