Does it make sense to get infotainment system installed from मारुति सुजुकी dealership or should we get itinstalled from the market?

You can get the infotainment system from where you want, the only thing which has to be taken care of is the warranty. Sometimes getting anything installed in the car from the aftermarket can lapse the warranty because the installation requires cutting the wires and add a join that can disturb the other electric parts of the car and leads to avoidance in warranty. So its always suggest to get it done from the authorized service center or go for plug and play devices. You can click on the following link to see the details of the nearest service centre and selecting your city accordingly - Service centre.