Datsun GO is offered with a 1.2-liter 3-cylinder petrol engine. This engine comes mated to either a 5-speed MT or a CVT. While it produces 68PS when paired to the manual gearbox, it goes up to 77PS with the CVT. The petrol motor, however, produces identical torque (104Nm) with both transmission options.
For this, we would suggest you to get in touch with the nearest authorized service center or refer to the user manual of your vehicle. Follow the link and select your city accordingly for service centers.
No, it would not be a feasible option to add Engine Start/Stop Button in Datsun GO T. Moreover, we would suggest you have a word with the nearest authorized service centre of Datsun in your city regarding this.