Mercedes ML W166 Rear Side Panel Tail Light Lamp LED Right O/S A1669064201

Mercedes ML W166 Rear Side Panel Tail Light Lamp LED Right O/S is an original lighting component from the Rear lights and brake lights group, designed for installation on the right side of the rear bodywork. Thanks to LED technology, it provides a clear light signal, improving vehicle visibility and safety during braking and changing direction.

Specifications and technical data

• SKU: A1669064201
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1669064201
• Substitutable numbers: A 166 906 42 01, A1669064201, A 166 906 06 57, A1669060657
• Location on the vehicle: Rear, Right
• Part type: Rear Light Assembly
• Category: Rear Light Assemblies

Purpose and function in the vehicle

The described lamp is dedicated to the rear right side of the body, where it is responsible for signaling position and brake lights. The use of LED technology translates into:

• more uniform light distribution,
• faster response during braking,
• stable operation under typical operating conditions. As an original component, designed specifically for the Mercedes ML W166 generation models, the lamp maintains factory geometry and mounting methods, which facilitates fitting to the body lines and the existing electrical installation.

Construction and LED technology

The lamp uses an integrated LED module, which provides a clear light pattern characteristic of the Mercedes brand. The design based on LED diodes allows for:

• obtaining intense, highly visible light with low energy consumption,
• increased durability of the light source compared to traditional bulbs,
• consistent appearance with other vehicle lighting elements. The lamp housing is profiled for the specific shape of the ML W166 body, which minimizes the risk of leaks after proper installation and ensures aesthetic integration into the rear of the vehicle.

Benefits of using an original tail light

Using an original LED rear side tail light in a Mercedes ML W166 brings a number of practical benefits:

• Factory fit – maintaining the correct body line and compatibility with the vehicle's electrical harness.
• Stylistic consistency – identical appearance to other lamps, with no differences in shade or light intensity.
• Stable operation of the lighting system – correct cooperation with the vehicle's electronics, including lighting monitoring systems. An element from this group is particularly important in the context of passive safety – properly functioning Rear lights and brake lights increase the readability of signals sent to other road users, which reduces the risk of rear-end collisions.

Characteristics of the used product

The offered lamp comes from the used parts segment, which allows for economical vehicle repair while maintaining the manufacturer's original specifications. In practice, this means the ability to restore full functionality of the rear lighting without having to resort to cheaper replacements with uncertain fitment. A used OEM component usually works better with the factory installation while maintaining proper lighting parameters. If you want to better understand why original dismantled components often prove to be a more durable and safer choice than cheap equivalents, it is worth reading the article Why do original dismantled parts fit better (and last longer) than cheap equivalents?.

Expansion and modernization of Mercedes rear lighting

If you are planning a comprehensive repair or modernization of the rear lighting zone in your Mercedes and need other elements from the same group, such as additional combination lamps, brake light modules, or side LED segments, check the available parts in the Mercedes rear lights and brake lights category.