India, April 16 -- Mahindra & Mahindra Ltd is at an advanced stage of assessing plans to upgrade its South African plant, according to people familiar with the matter, as India's second-largest automaker looks to capitalize on rising demand for affordable vehicles. The company has been working with the state-owned Industrial Development Corp to assess the feasibility of setting up completely knocked-down, or CKD, production at its facility near the port city of Durban, the people said, asking not to be identified because the discussions are private. Mahindra already assembles semi-knocked down vehicles at the plant. The growth in South Africa's mid-market segment has lured Chinese and Indian rivals that have eaten into the market share of c...