HELIX speaker fronts and rear mounting profiles shown in the vehicle upgrade package illustration
HELIX speaker fronts and rear mounting profiles shown in the vehicle upgrade package illustration
HELIX Ci3 W165FM-S3 included in the Soundtech MERCEDES 6.5
HELIX Ci3 W165FM-S3 included in the Soundtech MERCEDES 6.5" Speaker Upgrade Type 5 package
HELIX FlexMount CFMK165 included in the Soundtech MERCEDES 6.5
HELIX FlexMount CFMK165 included in the Soundtech MERCEDES 6.5" Speaker Upgrade Type 5 package
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HELIX Mercedes 6.5" Speaker Upgrade Type 5, Ci3 Door Woofer to Suit Various Mercedes Models, 3Ω

SKU: 116688
Price
$380
Inc. GST. Most orders ship Australia wide for a flat $15.95. Larger or heavier items may cost more.
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Shipping information

Australia wide flat rate shipping is $15.95. Larger or heavier items may cost more; we will confirm when your order is processed. In stock items are dispatched within 1 to 2 business days. Report transit damage within 24 hours with photos so we can lodge a freight claim.

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HELIX speaker fronts and rear mounting profiles shown in the vehicle upgrade package illustration

HELIX Mercedes 6.5" Speaker Upgrade Type 5, Ci3 Door Woofer to Suit Various Mercedes Models, 3Ω

$380

Product features

This Soundtech kit pairs a HELIX Ci3 Door Woofer with the matching vehicle specific adapter, to suit Various Mercedes models. The full parts list is below so you know exactly what turns up before any trim comes off.

What is in the package

  • 1 x HELIX Ci3 W165FM-S3, 6.5" Midbass Woofer Pair, FlexMount, 3Ω
  • 1 x HELIX FlexMount CFMK165, 6.5" 3D Printed Speaker Adapter, Pair (version CFMK165 MB.5, Mercedes)

Parts list as set up on the Soundtech package listing, checked 9 November 2026.

Fitment

Suits Various Mercedes models
Soundtech speaker type Type 5
Impedance 3Ω
How it connects The factory speaker comes out and the new speaker goes in using the vehicle specific adapter. Soundtech says it fits the factory location without cutting and can be returned to factory, though some vehicles differ, so a pre-check is recommended.

Soundtech matches cars to this kit by the factory speaker type. Send us your VIN or build date and we will check your car uses this speaker location before you order.

Installation and tuning

Soundtech designed this for a straightforward install using the supplied adapter.

Warranty

Soundtech, the Australian distributor, gives its products a standard 12 month Australian warranty. That is on top of your rights under the Australian Consumer Law.

Frequently asked questions

Will this suit my car?

It suits Various Mercedes models. Soundtech groups these kits by factory speaker type, so send us your VIN and we will confirm before you order.

What comes in the package?

1 x HELIX Ci3 W165FM-S3; 1 x HELIX FlexMount CFMK165. The full descriptions are in the parts list above.

How does it connect to the factory system?

The factory speaker comes out and the new speaker goes in using the vehicle specific adapter. Soundtech says it fits the factory location without cutting and can be returned to factory, though some vehicles differ, so a pre-check is recommended.

What warranty does it have?

Soundtech gives a standard 12 month Australian warranty, on top of your rights under the Australian Consumer Law.

Frequently Asked Questions

Quick answers to our most common customer questions.

Will this fit my exact vehicle?
Check the application above with us before ordering. We need the model, series, build date, factory audio system and installation position. A vehicle badge on its own is not enough to confirm the right version.
Are the exact package components confirmed?
The distributor describes speakers with a vehicle mounting adaptor, supplied as separate items. Check the exact driver, adaptor, quantities and any connection leads with us before ordering.
What should I check before installation?
Check the exact equipment model, the relevant dimensions and connections, and any extra parts listed above. Ask your installer to confirm the full system before fitting.
Can Frankies help me check the right version?
Yes. Contact us with the model you are ordering and the equipment or vehicle application so we can check the relevant details.
What warranty applies?
Your purchase is covered by the Australian Consumer Law. Contact Frankies for the warranty terms for this model.