I actually learned the window trick with the remote from my mercedes clk430 i had in 06. It seems to be that the Benz and BMW share nearly identical traits in their electrical brains. Also since they are both German they have equally crappy plastics and failing electrical so the only difference i can find in the two is the BMW is more fun to drive and the Mercedes key ignition is $3000 if it fails.

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~2003 X5 4.4i~