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Two black plastic adapter plates for Mercedes door speakers

METRA

METRA 82-8705 3.5" Door Speaker Adapter Plate Mercedes 2014-2020 Pair

SKU CH-HM8G-7S450

Adapter plates mount 3.5-inch door speakers into factory Mercedes locations for 2014-2020 models, sold as a pair

  • Product typeSpeaker Brackets
  • Installs 3.5" speakers without drilling
  • Fits factory door openings on select Mercedes
  • Covers model years 2014 through 2020
  • Includes both left and right adapter plates
  • Part number 82-8705 for exact ordering

METRA 82-8705 Adapter Plates for Mercedes

These adapter plates allow the installation of 3.5 inch door speakers in select Mercedes vehicles from 2014 to 2020. They mount directly to the factory location without drilling. The product is sold as a pair for both front doors.

Suitable for owners replacing factory speakers

Buyers needing brackets for different speaker sizes should look elsewhere. Installers who require wiring harnesses or additional mounting hardware must source those separately. Vehicles outside the listed model years are not supported.

Designed for 3.5 inch speaker fitment

The 3.5 inch speaker compatibility is the critical specification that determines if this kit matches your upgrade plan. Verify your replacement speakers match this exact size before purchasing. Incorrect speaker dimensions will prevent proper installation.

How it compares

Measured against everything we stock in Car Audio Accessories & Wiring, at today’s prices. Recalculated every night.

Price $19.99
Cheaper than about 60% of the 2,768 comparable items (median $21.99).

Specifications

Product
Product typeSpeaker Brackets

Questions about this item

What does the 3.5" size mean for speaker choice?

The plates accept 3.5" door speakers so you can replace the factory units with aftermarket models of that diameter.

How does the factory mounting interface work?

Each plate bolts to the original Mercedes door opening using the existing screw pattern, so no new holes are drilled.

What clearance is needed behind the door panel?

The adapter sits flush against the metal door frame; measure your speaker magnet depth to ensure it clears the window mechanism.

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