What is the low and high beam bulb headlight bulb type for a 2010 Mercedes C300?

On the 2010 Mercedes C300, headlight bulb types vary by trim level. If your car has halogen headlights, the low beam uses an H7 bulb and the high beam uses an H1 bulb. If the car is equipped with Bi-Xenon HID headlights, both low and high beams rely on HID bulbs, typically D1S or, in some late models, D3S, with the high beam function provided by the xenon projector mechanism.

Halogen headlights (base configuration)

In the standard halogen setup, the vehicle uses separate bulbs for each function. This section outlines the common bulb types you would expect to find in a non‑Xenon C300.

• Low beam: H7


• High beam: H1

Halogen headlights on the 2010 C300 pair a dedicated bulb with each function, making replacements straightforward but requiring the correct bulb type for both beams.

Bi-Xenon HID headlights (optional upgrade)

For buyers who opted for Bi-Xenon headlights, the headlamp assemblies use one HID bulb per side, with the high-beam function achieved through the xenon projector mechanism. This section identifies the typical bulb type used in these assemblies.

• Low and high beam: HID bulb type, usually D1S (and in some late-year models, D3S)

With Bi-Xenon, the same HID bulb is used for both low and high beam functionality, controlled by the projector’s internal mechanism rather than separate filaments.

How to confirm your exact bulb type

If you’re unsure which configuration your C300 has, check a few quick indicators. Look at the headlamp assembly and ballast label, consult your owner’s manual, or verify the build sheet or VIN‑specific documentation from Mercedes. If the ballast label or service documentation lists D1S or D3S, you likely have Bi-Xenon HID headlights. If you see a fuse/cover labeled for H7 and H1 bulbs, you likely have halogen headlights.

Summary

In short, a 2010 Mercedes C300 with halogen headlights uses H7 for low beam and H1 for high beam. If equipped with Bi-Xenon HID headlights, both low and high beams use HID bulbs—typically D1S, with some late models using D3S—where the high-beam function is achieved by the xenon projector rather than a separate filament. Verifying your specific build via the owner’s manual or VIN documentation will confirm the exact bulb type for your car.

How much does it cost to replace a headlight bulb in a Mercedes C300?

The average cost for a Mercedes-Benz C300 Headlight Bulb Replacement is between $253 and $326. Labor costs are estimated between $72 and $105 while parts are priced between $182 and $221. This range does not include taxes and fees, and does not factor in your unique location. Related repairs may also be needed.

Is my high beam and low beam the same bulb?

It all depends on the type of headlight bulb in your vehicle. Some bulbs can be used as both high and low beams. Other vehicles switch back and forth between two different bulbs…

What number light bulbs are used on the 2010 C300?

Mercedes-Benz C300 (2008-2010) Bulb Size Chart

What year C300 to stay away from?

Short Answer: 1994, 2001, 2013, and 2014.
If we had to advise some years to avoid, we'd recommend refraining from the 1994, 2001, 2013, and 2014 selections. Their performance was less than ideal.