Dear all, problem resolved, the battery was almost dead. Some days ago, I did some cleanup with the window mechanisms during afternoon time, closed all doors as usual & parked the car, that was not moved for 3 days. Last afternoon, I've rechecked all electrical I could and out of interest, decided to recheck the battery - it was almost dead. After recharging it and shut the driver's door, the light under the steering wheel was on, and found out that the driver's door switch was malfunctioning (was on). I assume that this happened, causing the battery to go flat. So, please re-check these switches regularly, else, they can chew plenty of amps.
For the benefit of Telstar drivers, rattling noise inside the
distributor = dead battery. Many thanks, Flokos.