I want to install a subwoofer box (2 12s) in the trunk of my w211. It has the Harmon Kardon sound system. I have been digging to see if anyone has done it and all im finding is people saying that with the HK system there is already wiring for the sub located on the rear deck and that it is a relatively easy install. But i have found no one who has actually done it and shown how to wire it to the stock headunit (i have a 09 w the updated command system) If anyone has done or knows someone who has/ is familiar with w211 audio systems any help would be much appreciated!

We removed the factory stereo and speakers to install a double din touchscreen stereo w/ bluetooth.For this install we used a Pioneer AVH-P3400BH stereo System w/ Bluetooth, iPod, iPhone. May 09, 2008 W123 subwoofer install. 77 240d, 02 Ford F250 V10 (7mpg), 05 GMC Denali. In order to be able to post messages on the Mercedes-Benz Forum forums. Products for install subwoofer Mercedes c class w203.