Buying a BS4 car in Delhi NCR is not a good idea, as you run the risk of being unable to use it when the AQI worsens and GRAP measures are implemented. This can disrupt your commutes and cause significant inconvenience. If you want to buy a used car, we suggest looking for a BS6 option or a vehicle that is no more than 5 years old. 

You can visit spinny.com to see what is available. Ideally, you should stretch to a new car that is fully compliant with the latest regulations. This means it will also be designed to run on E20 fuel, unlike vehicles before 2023. 

A Maruti-Suzuki Wagon R would be the ideal new car for you.  Its high seating position offers the double benefit of making learning to drive easier for beginners and making it easier for elderly people to get in and out. Wagon R prices range from Rs. 6-8 lakh, depending on the variant. 

For your usage, the Maruti Suzuki Wagon R can be an excellent choice. It is one of the most spacious budget cars, and its reliability is well documented. 

Maruti has the most expansive service network; you won't find it difficult to find service stations, which can be an issue for other brands, as your parents live in a remote location. 

The variant we recommend is the Wagon R VXi Manual with the 1.0-litre engine. The 1.2-litre engine is worth considering only if you frequently drive in hilly areas, as it makes uphill driving a bit more effortless.
 

If you are finding more value in the Maruti Wagon R, you should go ahead with this, as in the end, that is what matters to you. However, do bear in mind that the boot of the Wagon R is completely filled with the large single CNG tank and the spare tyre, thus leaving practically no space for even small bags. 

The Tata Tiago CNG, on the other hand, has the spare tyre underneath the car and comes with a dual CNG cylinder setup which sits below the boot floor, thus leaving you with a decent amount of luggage space.        

The 1.2-litre K-Series engine in the Maruti Wagon R makes it feel noticeably peppier and relatively more effortless than the 1.0-litre petrol version. Also, being a four-cylinder unit, it is a bit smoother and more refined as well. 

Yes, the 1.0 will be a bit more efficient than the 1.2; however, if you like to drive and if it falls within your budget, quite simply go for the 1.2. The Tata Tiago has its strengths, like a good sound system, and better driving manners than a Wagon R; however, in terms of space, user-friendliness, smoothness and overall sales and support, the Maruti car is the one to go for.

Within your budget, you have two Maruti Suzuki options, the Wagon R 1.2 ZXi AMT and the Ignis Delta AT. 

The Wagon R is the more practical choice with a roomier cabin and a larger boot, while the Ignis feels more premium inside and looks more stylish. Both use 1.2-litre four-cylinder engines, but they are not identical. 

On paper, the Ignis makes 8 hp less than the Wagon R, yet in real use, there is little difference, and the Ignis' 1.2 litre K12 engine actually feels a bit more responsive at low speeds than the K12N in the Wagon R.

The new Maruti Wagon R will serve your needs best. It is more spacious, more grown up and will be comfier than your 2009 version. Its light controls, efficient engine and good visibility make it a very user-friendly car. 

Alternatively, you may consider a Tata Punch for its high seating, robustness, and ease of getting in and out.