EXHIBIT 3.3


                                                            DORSEY
                                                            Dorsey & Whitney LLP




                                January 12, 2018

The Bank of New York Mellon
as Trustee of
Advisors Disciplined Trust 1846
2 Hanson Place
Brooklyn, NY  11217


     Re:          Advisors Disciplined Trust 1846 (the "Trust")

Ladies and Gentlemen:

We are acting as your counsel in connection with the execution and delivery by
you of a certain Reference Trust Agreement (the "Trust Agreement"), dated as of
today's date, between Advisors Asset Management, Inc., as Depositor, Evaluator
and Supervisor (the "Depositor", "Evaluator" and "Supervisor"), and you, as
Trustee, establishing the Trust, and the execution by you, as Trustee under the
Trust Agreement, of receipts for units evidencing ownership of all of the units
of fractional undivided interest (such receipts for units and such aggregate
units being herein respectively called "Receipts for Units" and "Units") in the
Trust, as set forth in the prospectus, (the "Prospectus") included in the
registration statement on Form S-6, as amended to the date hereof (the
"Registration Statement"), relating to the Trust.  The Trust consist of the
securities listed under "Portfolio" in the Prospectus, including delivery
statements relating to contracts for the purchase of certain securities not yet
delivered and cash, cash equivalents or an irrevocable letter or letters of
credit, or a combination thereof, in the amount required to pay for such
purchases upon the receipt of such securities (such securities, delivery
statements and cash, cash equivalents, letter or letters of credit being herein
called the "Portfolio Assets").

We have examined the Trust Agreement, and originals (or copies certified or
otherwise identified to our satisfaction) of such other instruments,
certificates and documents as we have deemed necessary or appropriate for the
purpose of rendering this opinion.  In such examination, we have assumed the
genuineness of all signatures, the authenticity of all documents submitted to us
as originals and the conformity to the original documents of all documents
submitted to us as copies.  As to any facts material to our opinion, we have,
when relevant facts were not independently established, relied upon the
aforesaid instruments, certificates and documents.

Based on the foregoing, we are of the opinion that:

1.   The Bank of New York Mellon is a corporation organized under the laws of
the State of New York with the powers of a trust company under the Banking Law
of the State of New York.


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2.   The Trust Agreement and the Standard Terms are in proper form for execution
and delivery by you, as Trustee, and each has been duly executed and delivered
by you, as Trustee, and assuming due authorization, execution and delivery by
the Depositor, the Trust Agreement and the Standard Terms are valid and legally
binding obligations of The Bank of New York Mellon.

3.   The Receipts for Units are in proper form for execution by you, as Trustee,
and have been duly executed by you, as Trustee, and pursuant to the Depositor's
instructions, the Trustee has registered on the registration books of the Trust
the ownership of the Units by Cede & Co., as nominee of the Depository Trust
Company where it has caused the Units to be credited to the account of the
Depositor.

In rendering the foregoing opinion we have not considered, among other things,
the merchantability of the Portfolio Assets, whether the Portfolio Assets have
been duly authorized and delivered or the tax status of the Portfolio Assets
under any federal, state or local laws.

The foregoing opinions are limited to the laws of the State of New York and the
federal laws of the United States of America.  This opinion is for your benefit
and may not be disclosed to or relied upon by any other person without our prior
written consent.

We hereby consent to the filing of this opinion letter as an exhibit to the
Registration Statement relating to the Units and to the use of our name and the
reference to our firm in the Registration Statement and in the Prospectus.

Very truly yours,


/s/ Dorsey & Whitney LLP