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First of all my apology in late posting. Ultimately I found the root cause of the issue which makes me stressed! Since the above attempt did not successful, I went to the garage again. This time also they recommend me to replace the nylon “Grommet” (The correct name of it - Found on Internet) with a Teflon made one. So I went to a lathe work shop again and got it lathed and fixed in to the Master cylinder by them itself. Garage people has put some silicone to seal it and installed the reservoir tank. After couple of days, again I observed that one of the nylon "Grommet" is leaking. This time I decided to not to go to the garage anymore and fix this by myself. I felt that no more Teflon/Nylon “Grommets” will not solve the matter. After Googling a while, found that the ideal/original one will be a rubber made one which resist on Brake fluid. Ring few spare part shops and everybody said they don’t have it and only comes with the full pump kit. When I called the Lathe shop, they also didn’t had any Brake Fluid resistant rubber. So I decided to go to Panchikawatta to fine a used one as I have the old master pump which was removed some time back, which will help me to find the correct size without removing the one fixed at the Car right now. After visiting couple of recon part shops in “Waththa” beside to the bridge, one shop owner volunteer to remove and give it from one of the old master pump which was hanging on his shop, as everyone else refused to sell only the “Grommet”. He found the exact size by looking from outside with his experience and the Caliper verified the same measurement. So I asked him how much he need for this and he quoted Rs. 1,500/- just for two tiny rubber Grommets. I felt that he is trying to take the advantage out of situation and I told him that this is way too much as it was just Rs. 400/- to lathe the same from Teflon. Then he jumped down the price to Rs. 1,000/- but my bid was Rs. 700/- and I return back since there were lots of similar shops around and had a feeling that will find one for a reasonable price. Soon after the next shop I got in has directed me to a brand new spare part shop near Ajan*tha Moto*rs who had the same for just Rs. 150/- each so the total was Rs 300/-. (Check last couple of pictures) Removed the entire Master pump/tank by myself and fixed new “Grommets” by replacing Teflon made ones. Pushing the tank to the pump was a bit difficult task with new Grommets, but managed to get it done after struggling about 30 minutes. Sanded the Brake Booster outer cover and around the area against the slight rust due to leaking of Brake fluid and washed with clean water. After the area completely dry, applied couple of thick coats in black “Metal Primer”. Covered the area with couple of clothe pieces to protect the new primer from excessive fluid dropping. Installed pump unit back to the car and fill brake fluid little by little without connecting brake lines to get air out of the compression chamber. Once fluid start coming out of holes, fixed up the lines and released air by paddling method. I could not take photos in DIY job as Brake fluid was all around my hands. It’s more than a month by now and observed no leakages and in perfect condition. Even though it was a headache in beginning due to less competent garage staff, DIY job has given me a great satisfaction which cannot be valued.

Actually my car does not have an alternator, it has a DC to DC converter. Probably that's faulty. I don't know if it's a common thing for a DC/DC converter to fail. I'm taking the car for a repair this week. Thanks everyone for all the tips!

Just for knowing, what are the explanations/reassurance given by the car sale guys when you inquire about those prior to buying and after buying?any difference pre and post scenarios .

Q: Didn't the battery shop test the car for proper charging voltage after the battery was replaced? (min 13.5v) The battery is the last thing you should replace when it is not charging. Start by checking the alternator output by an electrician. The charging system may not be charging the battery to the right level, Start with checking battery connectors for proper mounting/tightness and oxidization. It is possible that your car may have had the charging system issue for some time.and may have played a part in the previous prob as when the car's electrical system is connected pretty much everything in a modern car ,... And yes the cooling fans have electric motors powering them. TT.

just an update on the issue, EFI issue is fixed now, took to noel. He cleaned the injectors and the fuel line and replaced fuel filter. Now the car is doing like 6.5 avg in colombo traffic. Went to gampaha and came back (90+km) and the car has done like 8-9km/l. Mind that i do drive the car hard at times if the roads are safe. Also replaced the fuel pressure pump as there was a issue with gradually flooring the pedal and the acceleration was low. BTW noel didnt plug in the scanner as he dont have the 3pin one, but all and all the fuel consumption issues are fixed

Oh great.I had so many sleepless nights wondering what Bubi would like better, a Merc or a Beemer. Thank you for digging up a 4 year old thread and letting us know

You might also want to give the condenser (it's the radiator like thing on the front of the car) a good wash, if there is mud/dirt on it cooling will drop substantially.

Clean ur Distributor cap and install. Your problem should be sorted.