Don't worry, 335 is normal and will be the usual scenario every-time you visit the fuel station - You can try with the "uncle-mode" though trust me even that won't help. What I've noticed over time is the car sucks fuel at low-end as well regardless of your attempt to be subtle with it.
@usmansameen - For the Pioneer dvd single-din player, did you require any kind of alterations for the car? - Anything being cut or altered would seriously hurt my soul, if I ever decide to opt for that route lol.
@Rahat083144 - The only problem I feel while driving the CL9 is that it feels quite dead in low-rpm-range. It needs to be pushed just a bit for it to be alive, there's this 'sweet-spot' where all that satisfaction comes rushing in lol. - I have the Euro R grille on my car, not that hard to maintain tbh - though the fitting isn't as proper, not all clips lock on properly.