Never ever take your liana to roadside mechanic. Please please try to understand. I also have a liana 2010 eminent and it is greatest car i ever had. Just because it has always been maintained by 3s. And it does not show any problem because local mechanics jumble things up. My 2005 cultus has always been maintained by local mechanics and i regret it.
My cultus had similar problem back some time and my mechanic jawed said same thing. Bhai FAN auto nahin manual kerwa lo ya ecu khulwao etc. Etc. There is nothing as ac card for which the mechanics take 5000. Jawed also tried to fool me. Jab bhi bachon ko cheez dilani hoti hai kisi se ac card ke bahaney 5000 le letey hain.
Simple and only solution: Go to 3s. Trust me brother, i am a liana owner also and i have seen some owners wreck their cars by local mechanics!