What is the low beam headlight bulb size for a 2009 Mercedes-Benz Benz CLS550?

The 2009 Mercedes-Benz Benz CLS550 uses a HID-D2S LED bulb for the low beam headlights. We recommend upgrading to LED for better visibility.

What is the high beam headlight bulb size for a 2009 Mercedes-Benz Benz CLS550?

The high beam bulb size for the 2009 Mercedes-Benz Benz CLS550 is H7 LED.

Why are my 2009 Mercedes-Benz Benz CLS550 headlights dim?

Dim headlights on a 2009 Mercedes-Benz Benz CLS550 can be caused by aging halogen bulbs, which lose brightness over time, or oxidation (cloudiness) on the plastic headlight lenses. Upgrading to a HID-D2S LED LED conversion kit can provide a significantly brighter and whiter light output.

Which bulb fits the 2009 Mercedes-Benz Benz CLS550 fog light?

The 2009 Mercedes-Benz Benz CLS550 uses a H7 LED bulb for the fog light position.

Is the 2009 Mercedes-Benz Benz CLS550 single or dual beam?

The 2009 Mercedes-Benz Benz CLS550 uses a dual bulb headlight system. This means you have separate bulbs for high and low beams.

Can I install LED bulbs on my 2009 Mercedes-Benz Benz CLS550?

Yes, the 2009 Mercedes-Benz Benz CLS550 comes with standard halogen bulbs from the factory, but they can be upgraded to LED. You will need a HID-D2S LED LED conversion kit for the low beams.

Does the 2009 Mercedes-Benz Benz CLS550 have fog lights?

Yes, the 2009 Mercedes-Benz Benz CLS550 takes a H7 LED bulb for the fog light position.

How do I change the headlight on a 2009 Mercedes-Benz Benz CLS550?

Turn off the vehicle and open the hood. Locate the headlight assembly from behind, remove the dust cover or retaining clip, disconnect the wiring harness, twist the old HID-D2S LED bulb counter-clockwise to remove it, then insert the new bulb and reassemble. Note: Mercedes-Benz vehicles use a CANbus system, so LED replacements may need an anti-flicker decoder. The whole process typically takes 10 to 30 minutes per side depending on accessibility.

Are LED headlights legal for a 2009 Mercedes-Benz Benz CLS550?

LED bulbs used off-road or in auxiliary lights are legal everywhere. For on-road headlight use, legality varies by state. Many states allow LED retrofits as long as the beam pattern meets DOT standards. For the best legal compliance, choose a DOT-approved HID-D2S LED LED kit that is designed as a direct replacement and produces a proper cutoff pattern without excessive glare.

How much does it cost to replace 2009 Mercedes-Benz Benz CLS550 headlights?

A pair of HID HID-D2S LED bulbs costs $50 to $150. If you have a shop do the work, expect an additional $20 to $50 in labor per bulb. Replacing them yourself at home saves the labor cost and usually takes under 30 minutes.

What is the difference between halogen and LED for a 2009 Mercedes-Benz Benz CLS550?

Halogen bulbs produce a warm yellow light (around 3200K), last 500 to 1000 hours, and draw more power. LED bulbs emit a brighter white light (5000-6000K), last 25,000+ hours, and use less energy. LED upgrades for the HID-D2S LED position are available as direct plug-and-play replacements. Since the Mercedes-Benz uses CANbus monitoring, choose a CANbus-compatible LED kit to avoid dashboard errors.

This vehicle is part of the 2007–2011 Mercedes-Benz Benz CLS550 generation. All models in this range share identical light bulb sizes.

Fitment Guaranteed for 2009 Mercedes-Benz Benz CLS550

What Size Bulbs Does a 2009 Mercedes-Benz Benz CLS550 Use?

Correct headlight, fog light, and tail light bulb sizes. Sourced from OEM catalog data.

Installation Difficulty

Hard (Tight clearances)

Est. Replacement Cost

$50 - $150 (HID System)

What Lighting System Does the 2009 Mercedes-Benz Benz CLS550 Have?

Lighting on the 2009 Mercedes-Benz Benz CLS550 is managed by a total of 13 bulbs, covering everything from primary headlights to signal indicators. It features an extensive lighting system powered by premium factory HID/Xenon technology utilizing D2S projector housings for high-intensity output. Note that Mercedes-Benz vehicles typically feature a CANbus electrical monitor that checks for specific bulb resistance.

LED Flicker Warning

This vehicle is known to use a CANbus system. Installing standard LEDs may cause flickering.

Use a CANbus decoder.

Can You Put LED Bulbs in a 2009 Mercedes-Benz Benz CLS550?

The 2009 Mercedes-Benz Benz CLS550 is already equipped with factory D2S HID/Xenon headlights. Since HID technology already provides exceptional brightness, we recommend staying with high-quality OEM replacement bulbs rather than attempting an LED retrofit for the primary headlights. However, the H7 LED fog lights are typically halogen and are excellent candidates for an LED upgrade to match the color temperature of your HID headlights.

2009 Mercedes-Benz Benz CLS550 Bulb Size Chart

Position	Bulb Size	Shop
Low Beam	HID-D2S LED	Buy HID-D2S LED →
High Beam	H7 LED	Buy H7 LED →
Fog Light	H7 LED	Buy H7 LED →
Brake Light	LED Bulb	Buy LED Bulb →
Side Marker	LED Bulb	Buy LED Bulb →
Turn Signal Front	3457AK LED	Buy 3457AK LED →
Turn Signal Rear	LED Bulb	Buy LED Bulb →
Reverse Light	921	Buy 921 →
Dome Light	6411	Buy 6411 →
License Plate	6418	Buy 6418 →
Map Light	2886X	Buy 2886X →
Parking Light	2825	Buy 2825 →
Trunk Light	6418	Buy 6418 →

Installation Guide

Open in YouTube →

Video suggestion: Installation GuideBy YouTube

Other Benz CLS550 Years

2018 2017 2016 2012 2011 2010 2007

More from Mercedes-Benz

Benz AMG 53 Benz AMG 63 Benz AMG 63 S Benz AMG GT R Benz AMG GT S Benz AMG GTS Benz B200 Benz CLS500

Other Vehicles That Use HID-D2S LED Bulbs

2019 Infiniti QX60 2019 Mitsubishi Outlander Sport 2019 Mitsubishi RVR 2019 Nissan 370Z 2018 Honda Odyssey 2017 Infiniti QX50