What are the Petrol variants of Renault Megane RS?

No, Renault Megane RS doesn't have ISOFIX.

Here are the Screen Size（inch) and variants of Renault Megane RS:

Here are the wheelbase(mm) and variants of Renault Megane RS:

Here are the Rear Tyres and variants of Renault Megane RS:

Here are the Brand and variants of Renault Megane RS:

Here are the Parking Sensor Front and variants of Renault Megane RS:

No, Renault Megane RS doesn't have Speakers.

Yes, Renault Megane RS is available in Seat Features(Rear). The available Seat Features(Rear) variants are: 2015 Renault Megane RS 265 Cup.

Here are the Length*Width*Heigh(mm) and variants of Renault Megane RS:

The height(mm) of Renault Megane RS are 1428.