Get a multi=-meter and start checking voltage. Battery should read 13+ with engine running above idle. If not, problem somewhere in the charging system. Start with the alternator and work into the system from there. It is possible to have a bad new alternator, but with all those new parts, could be a broken, disconnected or corroded wire somewhere.

Mexicans do excellent work in my neighborhood. If the handiwork is bad, the phrase is: "Should have hired a Mexican."

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13