The affirmed intercession of our Prophet Muhammad (صلى الله عليه وسلم) is of various types:

(i) The great intercession – which, amidst all his brothers from the other Prophets and Messengers is specifically for our Prophet (صلى الله عليه وسلم) and this is for the coming of Allaah so that Judgement may begin.

(ii) His (صلى الله عليه وسلم) intercession for people whose good and bad deeds are equal, so he will intercede for them to enter Paradise.

(iii) His (صلى الله عليه وسلم) intercession for another group of people for whom the Fire had been ordered, so he will intercede that they do not enter it.

(iv) His (صلى الله عليه وسلم) intercession for the raising of the ranks of those who have entered Paradise, that their rank be raised to one greater than what the reward for their actions would have given them.

(v) His (صلى الله عليه وسلم) intercession for a people to be entered into Paradise without reckoning.

(vi) His (صلى الله عليه وسلم) intercession for the lightening of the punishment for those who deserve it, such as his intercession for his uncle Aboo Taalib, that his punishment may be lightened.

(vii) His (صلى الله عليه وسلم) intercession for permission to be granted for all the Believers to enter Paradise.

(viii) His (صلى الله عليه وسلم) intercession for the people who committed major sins, amongst those who entered the Fire, that they may be brought out of it.

See Sharhut-Tahaawiyyah of Ibn Abil-‘Izz (d. 792H).

Source: The Foundations of the Sunnah by the revered Imaam, the Scholar, the Teacher, the Reviver of the Sunnah, the Subduer of Innovation, Ahmad ibn Muhammad ibn Hanbal (d. 241H), English Translation, Additional Footnotes and Chapters by Abu Iyaad Amjad ibn Muhammad Rafiq, Salafi Publications, Second Edition, p. 28 footnote.