Mel

Question 1

Arrive at plane, MEL says zero days remaining. Can you go?

Answer 1

As long as you dispatch with the MEL valid, you can go.
Meaning you can land with it expired.
Section 0, COMPLIANCE note.

Question 2

What to watch out for if have a CDL?

Answer 2

Usually accompanied with a performance degradation.
THEREFORE, should also be a PADD associated.

Question 3

What should be accompanied with (L)
Or (E)

Answer 3

Autoland and EDTO affected.

Should also be a PADD

Question 4

When does dispatch start?

Answer 4

After Engines start, and ready to move for first time.

Beware, if on taxi out you get a status, you should also refer to:
QRH MEL FCOM IOC ENG