In Portsdown Road, the station is Singapore's second hydrogen kiosk, built at a cost of S$1.5mil (RM3.36mil), excluding land cost. It is due to open next month, and will serve the six Mercedes-Benz A-class fuel-cell cars here. 

The cars – which run on electricity produced by a chemical process involving hydrogen and oxygen –have been on trial for a year, clocking a combined 125,000km. 

That is about 20,000km each, slightly more than the annual distance covered by an average passenger car here. 

The combined mileage of the Singapore fuel-cell Mercedes-Benz is one-third the 370,000km clocked by the total fleet of 60 fuel-cell A-class cars on trial around the world. 

DaimlerChrysler said it was satisfied with the performance of the cars here. Despite the heat and humidity, the cars have had few reliability problems beyond the first few months. Overall, they have been in the workshop for less than 10% of the time.