Good evening, everyone.
The De Soto Diplomat (built in several generations from 1937 - 1962) was an export-only model, which was mostly a badge-engineered Dodge or Plymouth. Since these are export models, and some were also built abroad, here are some minor changes to be made.

"Made for TR" should be added:
http://www.imcdb.org/vehicle_617121-De-Soto-Diplomat.html
http://www.imcdb.org/vehicle_558521-De-Soto-Diplomat-SP-15-C-1946.html
http://www.imcdb.org/vehicle_670536-De-Soto-Diplomat-1949.html
http://www.imcdb.org/vehicle_808521-De-Soto-Diplomat-1949.html
http://www.imcdb.org/vehicle_736475-De-Soto-Diplomat-SP-18-1949.html
http://www.imcdb.org/vehicle_732644-De-Soto-Diplomat-1950.html
http://www.imcdb.org/vehicle_558503-De-Soto-Diplomat-SP-20-1950.html
http://www.imcdb.org/vehicle_497855-De-Soto-Diplomat-1951.html
http://www.imcdb.org/vehicle_670526-De-Soto-Diplomat-1951.html
http://www.imcdb.org/vehicle_749167-De-Soto-Diplomat-1951.html
http://www.imcdb.org/vehicle_514826-De-Soto-Diplomat-SP-23-1952.html
http://www.imcdb.org/vehicle_514838-De-Soto-Diplomat-SP-23-1952.html
http://www.imcdb.org/vehicle_670575-De-Soto-Diplomat-1953.html
http://www.imcdb.org/vehicle_808515-De-Soto-Diplomat-1953.html
http://www.imcdb.org/vehicle_834507-De-Soto-Diplomat-SP-25-1953.html
http://www.imcdb.org/vehicle_670577-De-Soto-Diplomat-1954.html
http://www.imcdb.org/vehicle_670516-De-Soto-Diplomat-1955.html
http://www.imcdb.org/vehicle_694509-De-Soto-Diplomat-1955.html
http://www.imcdb.org/vehicle_670578-De-Soto-Diplomat-1956.html
http://www.imcdb.org/vehicle_670856-De-Soto-Diplomat-1956.html
http://www.imcdb.org/vehicle_834510-De-Soto-Diplomat-1956.html
http://www.imcdb.org/vehicle_670817-De-Soto-Diplomat-1959.html
http://www.imcdb.org/vehicle_423240-De-Soto-Diplomat-1960.html
http://www.imcdb.org/vehicle_368206-De-Soto-Diplomat-Custom-SP-23-C-1952.html

"Made for PRI" should be added:
http://www.imcdb.org/vehicle_472202-De-Soto-Diplomat-1946.html

"Made for HK" should be added:
http://www.imcdb.org/vehicle_141842-De-Soto-Diplomat-SP-15-C-1946.html
http://www.imcdb.org/vehicle_1016357-De-Soto-Diplomat-Custom-1960.html

"Made for AUS" should be added:
http://www.imcdb.org/vehicle_306186-De-Soto-Diplomat-SP-15-C-1946.html
http://www.imcdb.org/vehicle_1021133-De-Soto-Diplomat-SP-24-1953.html

"Made for IND" should be added:
http://www.imcdb.org/vehicle_479559-De-Soto-Diplomat-SP-15-C-1946.html
http://www.imcdb.org/vehicle_653175-De-Soto-Diplomat-SP-15-C-1946.html
http://www.imcdb.org/vehicle_1004942-De-Soto-Diplomat-1961.html
http://www.imcdb.org/vehicle_597053-De-Soto-Diplomat-Custom-1954.html
http://www.imcdb.org/vehicle_785633-De-Soto-Diplomat-Custom-1954.html
http://www.imcdb.org/vehicle_810758-De-Soto-Diplomat-Custom-1954.html
http://www.imcdb.org/vehicle_892888-De-Soto-Diplomat-Custom-1954.html
http://www.imcdb.org/vehicle_479141-De-Soto-Diplomat-Custom-SP-25-3-1954.html
http://www.imcdb.org/vehicle_479577-De-Soto-Diplomat-Utility-SP-20-1950.html

"Made for CH" should be added:
http://www.imcdb.org/vehicle_758915-De-Soto-Diplomat-SP-15-C-1946.html
http://www.imcdb.org/vehicle_872478-De-Soto-Diplomat-SP-18-1949.html
http://www.imcdb.org/vehicle_312213-De-Soto-Diplomat-SP-28-1956.html

"Made for F" should be added:
http://www.imcdb.org/vehicle_41551-De-Soto-Diplomat-1949.html
http://www.imcdb.org/vehicle_859455-De-Soto-Diplomat-SP-18-1949.html
http://www.imcdb.org/vehicle_875924-De-Soto-Diplomat-1951.html
http://www.imcdb.org/vehicle_396755-De-Soto-Diplomat-1956.html
http://www.imcdb.org/vehicle_418049-De-Soto-Diplomat-1956.html
http://www.imcdb.org/vehicle_418109-De-Soto-Diplomat-1956.html
http://www.imcdb.org/vehicle_36667-De-Soto-Diplomat-SP-29-1956.html
http://www.imcdb.org/vehicle_92081-De-Soto-Diplomat-SP-29-1956.html
http://www.imcdb.org/vehicle_163276-De-Soto-Diplomat-SP-29-3-1956.html
http://www.imcdb.org/vehicle_880624-De-Soto-Diplomat-1957.html
http://www.imcdb.org/vehicle_79851-De-Soto-Diplomat-1958.html
http://www.imcdb.org/vehicle_18646-De-Soto-Diplomat-Convertible-SP-23-1952.html
http://www.imcdb.org/vehicle_187443-De-Soto-Diplomat-Custom-SP-26-1955.html
http://www.imcdb.org/vehicle_294018-De-Soto-Diplomat-Custom-Suburban-SP-26-1955.html
http://www.imcdb.org/vehicle_451725-De-Soto-Diplomat-Custom-Suburban-SP-26-1955.html

"Made for MA" should be added:
http://www.imcdb.org/vehicle_17563-De-Soto-Diplomat-SP-18-1949.html
http://www.imcdb.org/vehicle_11133-De-Soto-Diplomat-SP-23-1951.html
http://www.imcdb.org/vehicle_17569-De-Soto-Diplomat-SP-23-1951.html
http://www.imcdb.org/vehicle_11132-De-Soto-Diplomat-SP-29X-1956.html
http://www.imcdb.org/vehicle_17555-De-Soto-Diplomat-Convertible-SP-18-1949.html

"Made for C" should be added:
http://www.imcdb.org/vehicle_97554-De-Soto-Diplomat-SP-18-1949.html
http://www.imcdb.org/vehicle_217928-De-Soto-Diplomat-SP-18-1949.html
http://www.imcdb.org/vehicle_962515-De-Soto-Diplomat-1951.html
http://www.imcdb.org/vehicle_97543-De-Soto-Diplomat-SP-25-3-1954.html
http://www.imcdb.org/vehicle_34980-De-Soto-Diplomat-SP-26-1955.html
http://www.imcdb.org/vehicle_34981-De-Soto-Diplomat-SP-28-1956.html
http://www.imcdb.org/vehicle_877439-De-Soto-Diplomat-1958.html
http://www.imcdb.org/vehicle_876989-De-Soto-Diplomat-Custom-1957.html

"Made for I" should be added:
http://www.imcdb.org/vehicle_450870-De-Soto-Diplomat-SP-18-1949.html
http://www.imcdb.org/vehicle_539929-De-Soto-Diplomat-1955.html

"Made for S" should be added:
http://www.imcdb.org/vehicle_194175-De-Soto-Diplomat-SP-20-1950.html
http://www.imcdb.org/vehicle_743602-De-Soto-Diplomat-1956.html

"Made for N" should be added:
http://www.imcdb.org/vehicle_274204-De-Soto-Diplomat-SP-20-1950.html
http://www.imcdb.org/vehicle_876695-De-Soto-Diplomat-1953.html
http://www.imcdb.org/vehicle_330556-De-Soto-Diplomat-1956.html
http://www.imcdb.org/vehicle_876170-De-Soto-Diplomat-1957.html

"Made for RP" should be added:
http://www.imcdb.org/vehicle_142311-De-Soto-Diplomat-SP-20-1950.html

"Made for MEX" should be added:
http://www.imcdb.org/vehicle_278659-De-Soto-Diplomat-1951.html
http://www.imcdb.org/vehicle_291541-De-Soto-Diplomat-SP-23-1951.html
http://www.imcdb.org/vehicle_453525-De-Soto-Diplomat-SP-23-1951.html
http://www.imcdb.org/vehicle_571443-De-Soto-Diplomat-P-23-1952.html
http://www.imcdb.org/vehicle_289908-De-Soto-Diplomat-SP-27-1955.html
http://www.imcdb.org/vehicle_290073-De-Soto-Diplomat-SP-27-1955.html
http://www.imcdb.org/vehicle_289888-De-Soto-Diplomat-SP-28-1956.html
http://www.imcdb.org/vehicle_290074-De-Soto-Diplomat-SP-28-1956.html
http://www.imcdb.org/vehicle_571653-De-Soto-Diplomat-De-Luxe-1958.html

"Made for E" should be added:
http://www.imcdb.org/vehicle_570122-De-Soto-Diplomat-1951.html
http://www.imcdb.org/vehicle_24030-De-Soto-Diplomat-SP-28-1956.html
http://www.imcdb.org/vehicle_284218-De-Soto-Diplomat-LF3-M43-1958.html
http://www.imcdb.org/vehicle_530781-De-Soto-Diplomat-Custom-1956.html

"Made for J" should be added:
http://www.imcdb.org/vehicle_63668-De-Soto-Diplomat-SP-23-1951.html

"Made for T" should be added:
http://www.imcdb.org/vehicle_738070-De-Soto-Diplomat-SP-23-1951.html

"Made for CDN" should be added:
http://www.imcdb.org/vehicle_214688-De-Soto-Diplomat-1953.html

"Made for GR" should be added:
http://www.imcdb.org/vehicle_729533-De-Soto-Diplomat-1953.html
http://www.imcdb.org/vehicle_92087-De-Soto-Diplomat-SP-24-1953.html
http://www.imcdb.org/vehicle_631289-De-Soto-Diplomat-1954.html
http://www.imcdb.org/vehicle_614670-De-Soto-Diplomat-1957.html

"Made for EC" should be added:
http://www.imcdb.org/vehicle_465544-De-Soto-Diplomat-1953.html

"Made for PF" should be added. "PF" for French-Polynesia is not in the "made for..."-list yet.
http://www.imcdb.org/vehicle_277704-De-Soto-Diplomat-SP-25-2-1954.html

"Made for B" should be added:
http://www.imcdb.org/vehicle_244452-De-Soto-Diplomat-1956.html

"Made for FIN" should be added:
http://www.imcdb.org/vehicle_280701-De-Soto-Diplomat-1957.html
http://www.imcdb.org/vehicle_100480-De-Soto-Diplomat-1959.html

"Made for RL" should be added:
http://www.imcdb.org/vehicle_75253-De-Soto-Diplomat-1961.html

"Made for DK" should be added:
http://www.imcdb.org/vehicle_132101-De-Soto-Diplomat-1961.html

"Built in South Africa" should be added:
http://www.imcdb.org/vehicle_727364-De-Soto-Diplomat-1962.html