I replaced the module last week. It worked fine while warm as expected. Yesterday when it was cold again, the car did not start.

I learned that when the rearview mirrors flash red and green alternatly this means that there was an Unauthorized Start. I still only get the P1617 code.

So, the car is not recognizing my key and disarming. I tried all of the three keys I own - same thing.

Any recommendations?

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1996 (W210) E300D 86K - Traded in for a Lexus
1992 (W124) 300D 2.5 Turbo 202K - Sold
1983 (W123) 300D, 146K - Sold
1970 280S, 263K - Sold - Beginning of addiction