Many tools can clone Mercedes Benz SIM271DE 2.0 ECU on bench. Here we will show how to clone Benz SIM271DE 2.0 with Launch X431 IMMO Plus along with the X-prog3 programmer. The ECM was replaced because it had burnt drivers for the coils. Something that is very common on these this particular computer style. This is the original Continental SIM271DE 2.0 and the left is our used replacement that got from a junkyard. We are going to use the Launch X431 IMMO Plus along with the X-prog3. This unit comes with the IMMO Plus whenever you buy the full package. We are going to start by selecting IMMO Prog. It gives us a little diagram of how to connect the x-prog3. Once we get into the menu, we’re going to select engine, scroll down and find SIM271DE. Click on view wiring diagram. Now we have two different options of how we can do this with or without the MCU3 adapter. In this case, we don’t need the MCU3 adapter. Here’s the wiring diagram. It shows us exactly w...
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