Booking Procedure..- need advice

Hi All,

I did booking for a SX4 Zxi (non leather) in June in Mumbai ( with dealer - Vittesse). At that time I paid the booking amount of 50K. They told me that the rest of the amount need to be paid after the car reaches dealers godown and after I pay they will get the vehicle to Mumbai and get it registered.It will take 2-3 weeks after the payment to get delivery of the vehicle.I agreed to all these.

But today (16th of Aug)I was surprised to get a call  from the dealer telling me that The car is despatched from Gurgaon and I have to pay as much as I can pay now. While I really don't mind paying in advance, I don't want to be taken for a ride by the dealer. Can anybody clarify, is this a usual practice by Maruti dealers?.