Maruti Suzuki Celerio Diesel Might Launch in May 2015 Maruti Suzuki Celerio diesel, one of the most-awaited vehicles of the year, might hit showrooms in May. The company has already begun car’s production at its Mansear plant. Maruti Suzuki has been working on a small 800cc diesel engine for quite a long time that will power multiple small cars from Maruti Suzuki along with an LCV.