Mercedes Benz SD C4 plus  with 1:1 copy program should be the best DOIP diagnostic tool, it features in:

1.When it upgrades the firmware, you don’t need to install the batteries as the old SDC4, which is convenient and avoid the damage to the hardware.

2.The Wifi will be automatically connected after starting on SDC4 and it is very stable. You can use the WIFI to surf the net and diagnose Benz, so the testing job can be finished remotely.

3.New SDC4 is made of superb craftsmanship and good quality, waterproof, shockproof and tamper-proof.

4.Can directly run the original software.Can run DTS and Vediamo engineering software.

5. Can work with the 24V truck. Skip to the last paragraph for sdconnect c4 plus coverage.

 New SD C4 Plus 1:1 copy wins old SDC4 in:

New SD C4 1:1 copy firmware update doesn’t need to install the battery, while old SDC4 needs.

2019 SD C4 Plus  1:1 copy Xentry test DOIP: No Issues

    SD C4 Plus  1:1 copy Mercedes Xentry Coverage:

Passenger car, Van, Truck, Unimogs, Busses, Super sports cars, Industrial major assemblies, Special procedures.

Thanks.

https://www.ebay.com/itm/123859380293?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1555.l2649