sorry for the slow reply, does the problem solve?

check ignition coil & socket and fuel pressure

if it's auto, i'll suggest you to take genuine Perodua mounting set, i know the price is a pain, rm700+.

if it's manual, either genuine Perodua mounting set or after market brand, Schmaco, should be priced rm300+-.

shock absorber, choose either comfort or handling, unfortunately we're not driving Bentley, there won't be perfect comfort and handling.   

1. sounds like wiring or connector on switch or window motor short circuited.
2. check starter; cheapskate not permanent solution which might kill the starter faster, hold your key on 'start' position until the engine starts to crank.
3. your question?!
4. ionizer, 4x 10mm bolt to take out whole assembly, unplug the socket and reinstall back.
5. same for all Kenari/Kelisa, no solution unless you're planning to retrofit an aftermarket a/c system, i won't recommend, better just live with it. 

as i can understand, silicone wipers have higher resistance on wiping compare to rubber.

also, last batch Kenari in the market is already 12 years old, ageing on wiper motor is need to take in consideration.

i'm using silicone wipers + glass coating, wiper only on intermittent most of the time, rarely on first speed.

oldest alza in market is 2009, oldest kelisa is 2001, kancil is 1994.

check your wiper operation by looking from outside of the car, wiper blade might hit the windscreen molding and made the sound. unless you're the lucky one, in my experience other than silicone blade, hardly any other part of wiper made sound.
which part of gearbox is leaking?

H4
H3 (for peanut, not sure about aerodown and rs)
festoon 31mm
w5w (t10 if it's led)

w16w (t15 if it's led)

w16w (t15 if it's led)

no need to remove the headlights, just remove grill

after u remove th grill u can reach the bulb

i change mine many times this way