I have searched countless times, including the forum search function, for how to install an aftermarket subwoofer in a w203 wagon with Bose. I have not bought the sub/amp yet, and would just like to get some feedback on whether this can be done with ease or not. I installed a similar setup on a w124, but I feel as if this may be another animal. First off, where do I get my input from? Should I tap into the subwoofer amp wiring (as I did in the w124) or is there an easier way? If so, where is the subwoofer amp and an appropriate ground? Also, where should I run the positive cable through the cabin?

(it is thick 4 gauge wire). Just trying to keep this as clean as possible, without breaking any interior pieces.

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