What LED bulbs fit a CLS CLA and CLK?

A CLS CLA and CLK uses T10 wedge bulbs (W5W/194/168) for the map, door, footwell and license plate lights, and festoon bulbs for the dome and trunk. AutoKitShop stocks 26 CLS CLA and CLK kits covering 2004–2017, each supplied with the correct adapters so no separate bulbs are needed.

Does a CLS CLA and CLK need CANbus error-free LEDs?

Most CLS CLA and CLK vehicles built after 2005 monitor the interior lighting circuit and will show a bulb-failure warning with a plain LED. A CANbus error-free kit includes the resistor or decoder that mimics the original load, so the warning stays off. Older vehicles with a simple on/off circuit run fine on standard LEDs.

How long does it take to install CLS CLA and CLK interior LED lights?

Allow 15 to 30 minutes. Switch the light off, pry the lens off with a plastic trim tool, pull the old bulb, push in the LED and test it before refitting the lens. If a bulb does not light, rotate it 180 degrees — LEDs are polarity sensitive. No wiring, coding or tools beyond a trim tool are required.

Will CLS CLA and CLK interior LEDs cause flickering?

Not with an error-free kit. Flickering on a CLS CLA and CLK is normally caused by the body control module pulsing the circuit to test for a failed bulb. The built-in load resistor in an error-free kit absorbs that pulse. If you already own a non-CANbus kit, adding a decoder resolves it.

What colour temperature is best for a CLS CLA and CLK?

White (6000K) matches the factory LED signature on late-model CLS CLA and CLK cars and looks the most OEM. Warm white (3000K) suits older cabins with filament-era trim. Ice blue and purple are aesthetic choices. Colour is selected per bulb, so you can keep the dome white and tint the footwells.

Mercedes CLS CLA and CLK Interior LED Swap What the Dealer Wont Tell You

June 21, 2026

Mercedes LED Kit

Mercedes CLS LED Upgrade

Mercedes CLK LED Bulbs

What Is a CLS CLA and CLK Interior LED Light Kit?

A CLS CLA and CLK interior LED light kit is a set of direct-replacement bulbs that swap into the factory dome, map, reading, vanity, trunk, glove-box and footwell sockets without cutting or rewiring. (chassis codes W218, W219, C117, W209) AutoKitShop lists 26 CLS CLA and CLK LED kits covering model years 2004 to 2017. Kits for this model run from 2-piece to 23-piece sets. Each bulb is rated at 300 lumens and roughly 3x the brightness of the original incandescent lamp, at a fraction of the current draw, with a 50,000-hour service life. Kits are supplied as complete sets with the correct socket adapters, so nothing needs to be ordered separately. If a bulb does not light on first fit, rotate it 180 degrees, because LEDs are polarity sensitive. Colour options are white (6000K), ice blue, warm white (3000K) and purple.

What Should You Know About The Mercedes Interior Lighting Gap?

Mercedes Benz has always done interior lighting well at least on their high-end models. But when you look at the CLS (W218/W219), CLA (C117), and CLK (W208/W209/A208/A209), the story is different. These cars shipped with the same cost-cut incandescent bulbs that make the cabin feel a decade older than it is. The irony is that these are premium cars. The W219 CLS and the W209 CLK are genuine driver's cars. They deserve better than yellow dome lights.

On BenzWorld, the interior LED swap threads are some of the most-viewed topics. Guys with CLS63s and CLK500s posting before/after shots that get hundreds of replies. The common question is always the same 'Which kit actually works without throwing CANbus errors?'

What Is Included in the CLS CLA and CLK LED Kit?

This is a multi-model kit that covers five distinct Mercedes chassis. Each has specific piece counts:

CLS W218 (2011-2017): 21 pieces. Full coverage including footwell lights.
CLS W219 (2005-2010): 22 pieces. Extra lights in the rear pillar trim.
CLA C117 (2013-2019): 13 pieces. The coupe-styled CLA has fewer interior fixtures.
CLK W209 (2003-2009): 14 pieces. Covers the coupe and cabriolet.
CLK W208 (1997-2002): 12 pieces. Older chassis, fewer fixtures.
CLK A208/A209: 10-11 pieces. The cabriolet-specific trims.

Bulbs are 5050 SMD LEDs rated at 300% brightness over stock. Direct fit into existing sockets. No wiring modification.

What Is Included in the CLS CLA and CLK LED Kit?

The CLS W218 is a big car. The cabin is wide, the roofline is low, and the factory lighting in the rear seats is pathetic. Passengers sit in the dark. With LEDs, the entire cabin glows evenly footwells, door pockets, rear dome, vanity mirrors. It changes the atmosphere completely. On CLSOwners.com, there's a whole thread dedicated to LED upgrades where guys say it's the single best interior mod for under .

The CLK crowd benefits differently. Those cars have convertible variants, and when the roof is down at night, you need every lumen you can get. The LED kit makes the interior usable with the top down, which matters if you do night drives.

Heat is another factor. Old CLK and W208 interiors suffer from brittle plastic over time. Incandescent bulbs bake the housings. LEDs generate maybe 10% of the heat. Your trim pieces stay intact.

Will LED Bulbs Trigger a Warning Light on a CLS CLA and CLK?

Earlier Mercedes CANbus systems are notorious for being finicky with aftermarket LEDs. The CLK W208 and W209 use an older system that's more forgiving, but the CLA C117 and CLS W218/W219 use the newer LIN-Bus and CAN-Bus networks that monitor every bulb. Throw in a cheap eBay LED and you'll get interior lights that stay dimly lit even when 'off', rapid flickering, or 'bulb out' warnings on the cluster.

This kit has CANbus resistors built into each bulb housing. They simulate the resistance of the factory incandescent load. The Mercedes BCM can't tell the difference. No warnings, no ghost lighting, no flicker. Several members on BenzWorld's CLS W218 section have confirmed zero errors with this exact setup.

Which Colour Temperature Should You Choose?

White (6000K): Pure white that matches modern Mercedes LED ambient lighting. The forum favorite.
Ice Blue (8000K): Cool blue that looks aggressive in the CLS interior. Popular in the CLA crowd.
Purple: Show-car spec. Less common on Mercedes but the W209 guys run it for meets.
Warm White: Closest to the OEM halogen look but significantly brighter.

What Should You Know About OEM vs LED?

Feature	Factory Bulb	AutoKitShop LED
Brightness	~40-50 lumens	~180-220 lumens
Color	2700K yellow	White / Ice Blue / Purple / Warm White
Heat Output	High damages plastic over time	Near zero
Lifespan	1,000-2,000 hours	30,000+ hours
CANbus Ready	N/A	Yes built-in resistors
Wattage	5W	1.5-2W

How Do You Install LED Interior Lights in a CLS CLA and CLK?

The W218 CLS footwell lights use a twist-lock socket. Turn 90 degrees counterclockwise and pull. Do not pry you'll break the mounting tabs.
CLA C117 map lights there's a tiny Philips screw hidden under the lens on the driver's side. Remove that before prying or you'll crack the housing.
CLK W209 coupe the dome light assembly has four metal clips. Push the lens from the inside out.
Trunk lights on all models the entire unit slides toward the rear of the car then drops down.
If a bulb stays dimly lit after turning off, flip it 180 degrees. Mercedes CANbus systems respond differently to polarity with some resistor configurations.

What About Shipping and Warranty?

12-month manufacturer's warranty through AutoKitShop. Any bulb that arrives DOA or fails within the first year gets replaced at no cost. No return shipping, no restocking fees.

What Should You Know About Final Take?

Your CLS, CLA, or CLK is a proper Mercedes. The interior should feel like one. The factory bulbs are the weakest link in an otherwise well-designed cabin. For under and 20 minutes of your time, this kit brings the interior lighting up to the standard the car deserves.

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