The German Federal Ministry for Economic Cooperation and Development (BMZ) - KfW approved two loans for a total of Euro 545 million to the Indian Ministry of Finance to fund Metro Line 4 (Wadala to Kasarvadavli) and Line 4 A (Kasarvadavli-Gaikmukh). About 21% of the civil work on line 4 and 6% of civil work on line 4A are now complete.

MMRDA officials said Euro 255 million would be used to purchase rolling stock and an integrated ticketing system and Euro 90 million would be utilised on a multimodal integration system. After negotiations, the rate of interest on Euro 345 million is 0.29% and 0.07%. While on Euro 200 million the rate of interest is 0.82%. This is the highest amount given to India ever before, that too at the lowest rate of interest offered by any financial institution so far.