Mercedes MUX C4 Mercedes star diagnosis Compact 4 with Mercedes benz xentry 2017.3 win7 software
Hello，
My Xentry Das software no Fault Codes error, tried everything:
checked all fuses and relays (including the mini relays)
replaced terminal 30g relay
replaced exhaust camshaft sensor
checked crank sensor with oscilloscope and looks ok
tried second key
guided test for drive authorization (all ok)
and many many more
still no fault codes
OBD2Tuner.com technician have help to check the error may caused by:
The problem with most technically inclined individuals trying to fix a dead engine is that we tend to quickly forget ”THE BASICS “, ingredients for combustion to take place just so the engine may run!
OBD2Tuner.com MB Star SD Connect C4 multiplexer 2017.3 Mercedes Benz Xentry DAS software Fault Codes Error Solution:
1. Check for spark, is it there throughout or intermittently or not there at all,
-Famous L5, ECU, DI coils, e.t.
2. Check for fuel rail pressure ( challenging on any A-class but doable if u want it to start and run)
furthermore M270 has piezo direct injection. so u have to find a way to confirm that fuel is delivered (repair fuel system accordingly)
3. Check for compression and make reference to specific values in “WIS”
Hope this advices can offer reference for customer.
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