Headlight Lens W166 P/F for Mercedes-Benz ML-CLASS

Replacement clear polycarbonate headlamp lens for the Mercedes-Benz ML-Class (W166) pre-facelift. Precisely moulded to OE geometry to restore optical clarity and sealing when your original lens is cracked, yellowed, or crazed. Sold per side — choose Left or Right.

What this is / isn’t:

• Included: 1× clear outer lens  (lens only).

Key Features:

• OE-Accurate Profile: Correct curvature and bonding flange for a clean seal on W166 ML (pre-facelift) housings.

• Optical Clarity: UV-stabilised polycarbonate maintains a sharp beam cut-off and factory DRL signature.

• Seal-Ready: Smooth perimeter lip for reliable resealing with automotive butyl or PU headlight sealant.

• Cost-Effective: Replace only the damaged lens and retain your working internals.

Compatibility:

• ML-Class (W166) — 2012–2015 Pre-Facelift

• Works with Halogen and Bi-Xenon/ILS variants where the outer lens outline is shared (internals differ).
  Not for GLE (W166, 2015–2019 facelift), GLE Coupé (C292), or GL/GLS (X166). Always confirm by VIN and visual match to your lamp.

Related Part Number Families (cross-refs):
Typical complete-lamp families: A166-906-xx-xx (LH) / A166-907-xx-xx (RH). Lens subcomponents use variant-specific suffixes — verify via VIN and the stamp on your existing lens.

What’s Included / Not Included:

• Included: 1× clear headlamp lens only, side-specific.

• Not included: Housing, optics/modules, control units, DRL/indicator boards, adjusters, gaskets, rear covers, or sealant.

Installation Notes (Pro Tips):

• Remove lamp; gently heat perimeter (low-heat oven or careful heat gun) to soften factory adhesive.

• Separate lens; remove all old butyl/PU and test-fit before bonding.

• Use quality butyl rope (serviceable) or automotive PU (permanent). Clamp/tape evenly while curing.

• Ensure vent ports are clear; replace desiccant if fitted.

• After refit, check headlight aim and do a light-mist leak test to verify seal integrity.

• The beam pattern is set by the internal optics — replacing the lens does not change RHD/LHD cut-off.

Why Choose TOParts:
OE-quality Mercedes components focused on fit, clarity, and durable sealing — trusted by panel shops and Mercedes specialists across South Africa.

Q&A
Q1: Will a new lens fix condensation?
A1: Usually yes, provided the housing is clean, vents are open, and the lens is bonded with the correct sealant.

Q2: Is adhesive included?
A2: No. Use automotive-grade butyl or PU headlight sealant.

Q3: Can this lens fit the GLE facelift (2015–2019)?
A3: No. The facelift GLE uses different lamp tooling. Order the W166 F/L (GLE) lens instead.

Q4: Left or Right — which do I choose?
A4: Order the side that matches your damaged lamp. On right-hand-drive vehicles, Left = driver, Right = passenger. Verify against your VIN and lens outline.