ECUHELP KT200II is confirmed to work with Mercedes Crd3 e1 ECU, it is capable of reading, writing and doing checksum.

Look at this image of KT200II writing Mercedes Crd3 e1 successfully.
KT200II Read Write Checksum Mercedes Crd3.E1 on Bench-01

Maybe you are interested in the KT200II wiring diagram of DELPHI CRD3.E, CRD3.E1, CRD3.F1, CRD3P.B0, CRD3P.C0, CRD3P.D1, CRD3P.G0 – Solenoid [1793] Mercedes Benz [ Diesel ]:

Kit to use:
– Multifunction cable
– Bench Box v.2
KT200II Read Write Checksum Mercedes Crd3.E1 on Bench-02

Use KT200II to read and write use the following driver:
→ BENCH MODE
→ MERCEDES BENZ
→ TC1793 – MERCEDES

and choose between:
→ CRD3.E
→ CRD3.E1
→ CRD3.F1
→ CRD3P.B0
→ CRD3P.C0
→ CRD3P.D1
→ CRD3P.G0