I mounted an amp on the top of my trunk in the w126, fit very easily, just a couple sheet metal screws. Cut off an inch of too clearance but was otherwise out of the way. Grounded right to that metal too.

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TC
Current stable:
- 2004 Mazda RALLYWANKEL
- 2007 Saturn sky redline
- 2004 Explorer...under surgery.

Past: 135i, GTI, 300E, 300SD, 300SD, Stealth