Model designation

Mercedes 308CDI, 311CDI, 313CDI, 316CDI 903.621 ~ As of IDENT-NR. R337627, 5337627, A901274 ~
Mercedes 308CDI, 311CDI, 313CDI, 316CDI 903.623 ~ As of IDENT-NR. R337627, 5337627, A901274 ~