Those less than 2 years old should still be under the 5 year free CBD maintenance, as long as the mileage isn't very high and none of the 318 is more than 5 years old.
There's a review which praised the 318i for its fuel efficiency

The thing about the 318i is the missing comfort access function

As for BMW Malaysia, depending on your location, some service center may be rather swamped.
I have to wait 1 month for a slot to get some accessories fitted (the part is already in stock). But then, the same is happening to Honda/Toyota too

The service program covers up to 100,000 km or 5 years.
If the unit is a high miler, it would be near the end of the the program
I've seen some cars with good FC and cruising comfort hitting 40k as they are probably used for sales/customer visits

I suggest to check on pre-reg again since BMW is giving 1 year extra warranty for cars registered in the May-June period
If you are not in a hurry, wait for the roadshow or sales fair. There will be better deals there usually

45k in 2 years is still ok.
The guidance is whatever mileage the car has already clocked, you'll need to take that into account to calculate how much more free services you have.

By the way, if not mistaken, Ingress is having some sales event this week. Go check it out.
From experience, one may find pre-reg units at better deal than premium selection during these events without much bargaining.

June 2018, should be a recently release management unit.
Glad to hear you found your unit