<?xml version="1.0"?><?xml-stylesheet type="text/xsl" href="../4_X02.xsl"?><ownershipDocument>    <schemaVersion>X0303</schemaVersion>    <documentType>4</documentType>    <periodOfReport>2011-02-18</periodOfReport>    <notSubjectToSection16>0</notSubjectToSection16>    <issuer>        <issuerCik>0000880266</issuerCik>        <issuerName>AGCO CORP /DE</issuerName>        <issuerTradingSymbol>AGCO</issuerTradingSymbol>    </issuer>    <reportingOwner>        <reportingOwnerId>            <rptOwnerCik>0001366627</rptOwnerCik>            <rptOwnerName>Carioba Andre Mueller</rptOwnerName>        </reportingOwnerId>        <reportingOwnerAddress>            <rptOwnerStreet1>AGCO AMERICA DO SUL</rptOwnerStreet1>            <rptOwnerStreet2>RUA ARANDU, 1544 - CONJ. 83/84 -BROOKLIN</rptOwnerStreet2>            <rptOwnerCity>SAO PAULO</rptOwnerCity>            <rptOwnerState>D5</rptOwnerState>            <rptOwnerZipCode>04562-031</rptOwnerZipCode>            <rptOwnerStateDescription>BRAZIL</rptOwnerStateDescription>        </reportingOwnerAddress>        <reportingOwnerRelationship>            <isDirector>0</isDirector>            <isOfficer>1</isOfficer>            <isTenPercentOwner>0</isTenPercentOwner>            <isOther>0</isOther>            <officerTitle>Sr. VP, Gen Mgr South America</officerTitle>        </reportingOwnerRelationship>    </reportingOwner>    <nonDerivativeTable>        <nonDerivativeTransaction>            <securityTitle>                <value>Common Stock</value>            </securityTitle>            <transactionDate>                <value>2011-02-18</value>            </transactionDate>            <deemedExecutionDate></deemedExecutionDate>            <transactionCoding>                <transactionFormType>4</transactionFormType>                <transactionCode>S</transactionCode>                <equitySwapInvolved>0</equitySwapInvolved>            </transactionCoding>            <transactionTimeliness>                <value></value>            </transactionTimeliness>            <transactionAmounts>                <transactionShares>                    <value>10000</value>                </transactionShares>                <transactionPricePerShare>                    <value>56.84</value>                </transactionPricePerShare>                <transactionAcquiredDisposedCode>                    <value>D</value>                </transactionAcquiredDisposedCode>            </transactionAmounts>            <postTransactionAmounts>                <sharesOwnedFollowingTransaction>                    <value>48344</value>                </sharesOwnedFollowingTransaction>            </postTransactionAmounts>            <ownershipNature>                <directOrIndirectOwnership>                    <value>D</value>                </directOrIndirectOwnership>            </ownershipNature>        </nonDerivativeTransaction>    </nonDerivativeTable>    <footnotes></footnotes>    <remarks></remarks>    <ownerSignature>        <signatureName>Lynnette D. SchoenfeldAttorney-in-fact</signatureName>        <signatureDate>2011-02-22</signatureDate>    </ownerSignature></ownershipDocument>