Let’s say to get car around similar age ,Would it be better to just stick back to those proven to be reliable Japanese brand instead for reliability ? Or reliability just not found in most cars above 5 years , I wonder

Yes, I will never again buy peugeot. For the parts, they changed

-hydraulic for the car boot (no problem whatsoever suddenly change)
-window panel (works fine, after sending service suddenly problem, then came by 2nd time for them to fix it, they charged me, file complaint n maki them, they said next time problem they waive free panel change)
-dashboard color ( i dunno why need change, they claim new software system)

The others were essential parts like brake pad, timing belt, n etc. So i dont complain much

consider a Mercedes w211 e200 kompressor model (2007~2009)

it has a comfort, build quality of a tank, prestige, reasonable maintenance cost (if well taken care) and not to mention, tons of spare parts availability.

Got both a 2011 Peugeot and 2012 vw at home. The Peugeot goes in and out of the workshop every month without miss.. The VW only goes to workshop every  5-7 month once for repairs..

For D segment just get the passat, way better drivetrain than the prince engine and aisin gearbox combo on the pug..

Comparing the E60 to 508, ermm, the E60 needs lesser parts change in the same 5 years window. The major part changed for the E60 is actually the gearbox, which hasnt got it's transmission fluid changed before. So BMW's claim that it's "lifetime" transmission fluid is BS

FYI, i knew a few owners still driving E60.
BMW service center does recommend them to change the transmission during 60k, not sure if your service center did not inform you about it or miss-inform. 
The so call "lifetime" is just to let new owner fuzz free of no need to change fluid transmission during the warranty limit of 3 years or 60k. After that is your own already if the gearbox got any problem.. 

Nowadays, most downsize engine with turbocharger are created for efficiency, not high power. The torque is higher because the engine is able to extract more work out of small cc engine. Drive like one normally would, then there is no issue with the engine, but if one drive like they owned a supercar and rev high up near the red zone, the engine will kaput soon.

Fuel is also another issue, most EU engines are Euro 5 or 6 compliant now, but our fuel in Malaysia is still one or two generation behind, only recently RON95 Euro 4M, and diesel Euro 5 but not widely available. This is why continental cars are less reliable than Japanese cars, because most Japanese cars sold in Malaysia are still using those very old engine, like Honda 1.8L, which is Euro 4 standard only. Due to the low fuel standard in Malaysia, carbon deposit cleaner should be use more often, every 5,000km. The purpose of using carbon deposit cleaner is not to clean the intake valve, but to clean the injector ports so that the nozzle don't get clogged, resulting in a poor spray pattern which promotes pre-detonation/knocking and create even more sooting/carbon deposits, the vicious cycle.

I have a 2013 508 and have been using it for around 4 years now. First things first, the authorized service center sucks! If you car is not under warranty, I highly suggest servicing outside. Secondly, there are a few items which are being recalled (high pressure pump, timing chain, etc) so pls check if it has already been done by calling up the service center.

I have been servicing my car regularly every 9-10k km's and the ATF and every 40k km and so far I have not had any issues.

Some have been complaining about price or spare parts, but i personally think it's not that bad. The price of servicing the transmission oil is about rm350. Try comparing that to other continental cars like Volkswagen.

Is this the model mentioned?