CVT Fluid Flush

[msamoeed]

Hi, This is my first time posting on this forum so please forgive me if i am not adhering to the rules.

I recently bought a mirage 1.0L 2012 model with 100000 km on it and wanted to change the transmission fluid, so when i checked the fluid it was reddish and i think the OEM is either green or blue. I think the previous owner had put in the transmission fluid of lancer. Now i was wondering what are my options. Attached pictures below.

Should i just drain the fluid in it and change the filter? I think that would not get all the fluid out.
I have about 4 liter of fluid, the CVFT OEM one and the filter sitting at home but i wanted to get some insight before i went ahead and did something.

I am not getting any errors on the scanner tho.

BTW, i am from Pakistan and there aren't many technician available here who understand all these technicalities so i would have to tell them everything.