Chrysler L.L.C.\'s former parent, Daimler A.G., immediately will pump $200 million into Chrysler\'s underfunded pension plans under an agreement reached Monday with the Pension Benefit Guaranty Corp.

In addition, Stuttgart, Germany-based Daimler, which sold an 80.1% share of the financially troubled automaker to New York-based private equity firm Cerberus Capital Management L.P. in 2007, will pay $200 million into the plans in 2010 and in 2011.

If the Chrysler plans are terminated before August 2012, Daimler would pay the PBGC $200 million.

The agreement, which also was signed by Auburn Hills, Mich.-based Chrysler and Cerberus, replaces a 2007 pact between PBGC and Daimler, in which Daimler, among other things, agreed to a $1 billion guarantee if the pension plans were terminated within a five-year period.

Chrysler\'s pension plans, as of Nov. 30, 2008, had about $9.3 billion in unfunded benefits, according to the PBGC, of which about $2 billion would be guaranteed by the PBGC if the plans are terminated. The carmaker\'s plans have about 255,000 participants.

If the plans are terminated, it would be either the PBGC’s fourth or fifth biggest loss, depending on the current value of the plans\' assets and liabilities, and the biggest termination in terms of number of plan participants affected.

The PBGC\'s biggest plan takeover—in terms of loss to the agency\'s insurance program and number of participants in the plans—was the 2005 termination of United Airlines\' four pension plans. The plans had about 122,000 participants and $7.5 billion in unfunded PBGC guaranteed benefits.