Thank you so much for your input Ozzy!
Your feedback is one of the most convincing ones I had for these 4 months!
Quote:
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when you have both lights flashing alternately and the engine is cranking but wont fire it means that eng control unit has either wrong or no can signal from Ifz. basically your key is coded to the Ifz control unit and when you put your key in the ignition the Ifz receives that code and verifies it, if it is a matched code the Ifz will permit the engine control unit to function, this signal is sent via the can data bus
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So when the lights flash alternately, it means the ECU has no/wrong signal from the IFZ? Because I have recently replaced the IFZ Control Module and it didn't seem to help.
As of yesterday, the MB dealer has re-ordered a (coded) new key and new (coded) IFZ control module again for a another trial/test.
Apprieciating and awaiting your comments..