1) issue legal notice to showroom to kindly intimate details of buyer of your car
2) mention that till date car not transferred in name of purchaser
3) inform RTO about sale of car by you
4)enclose copy of delivery note received by you and proof of payment
5)you can also publish public notice in 2 local newspapers that the seller shall in no way whatsoever be responsible for any misdeeds,unlawful activities or any acts of omission or commission with the car (state make, model,type of body,registration number, engine and chassis nos.)by the buyer or any other person who directly or indirectly uses the bike for such misdeeds,unlawful activities or any acts of omission or commission. The liability of such misdeeds,unlawful activities or any acts of omission or commission shall solely rest with the buyer of the car ."