Tesla Inc's depreciation, depletion and amortization for the three months ended in Dec. 2018 was $497 Mil. Its depreciation, depletion and amortization for the trailing twelve months (TTM) ended in Dec. 2018 was $1,901 Mil.
Depreciation, Depletion and Amortization for the trailing twelve months (TTM) ended in Dec. 2018 was 416.233 (Mar. 2018 ) + 485.255 (Jun. 2018 ) + 502.825 (Sep. 2018 ) + 496.737 (Dec. 2018 ) = $1,901 Mil.