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Aloha,
Can someone tell me how or where the Amplifier Module #
Manufacturer Part Number:A 203 870 26 89
I am trying to replace this part. not really sure wheres it's located? I've seen a couple versions?
Does the rear window really need to come out?? Or is it a little less " PITA?"
Really sucks when I cant get the doors to lock or alarm to engage.
Any suggestions would help.
Thanks
 

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CURRENT: 2011 SL550 FORMER: C300, ML350, CLK550 Cabriolet, C240, ML320, 300TD
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You must drop the headliner. I think it also requires some special adhesive and procedures to attach it to the contacts on the glass.
 
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