The front-lighting configuration on the 2010 C300 varies by trim and market. In most base models with halogen headlights, you’ll find six front bulbs total (two low-beam, two high-beam, two fog lights). For models equipped with optional bi‑Xenon HID headlights, the low beams use HID bulbs (commonly D1S or D2S) and the high-beam behavior depends on the specific headlamp design. Details can differ by region and production year, so check your owner’s manual or inspect your vehicle to confirm exact bulb types.
Overview of headlight configurations
Below are the two most common front-lighting configurations for the 2010 C300 and the typical bulb counts associated with each.
Halogen headlights (typical on base models)
In halogen setups, the headlight assemblies house separate bulbs for low and high beams, and the fog lights live in the lower fascia. The typical bulb counts are:
- Left low-beam bulb: H7
- Right low-beam bulb: H7
- Left high-beam bulb: H1
- Right high-beam bulb: H1
- Front fog lights (left): H11
- Front fog lights (right): H11
With this halogen configuration, the front lighting system uses six bulbs in total. Rear, interior, and signal bulbs are not included in this count.
Bi-Xenon / HID headlights (optional; varies by market)
For C300s equipped with HID headlamps, the low beams are provided by HID bulbs, while the high-beam function can be handled differently depending on the exact headlamp design (Bi‑Xenon vs. separate high-beam). A typical setup looks like this:
- Low-beam HID bulbs per side (D1S or D2S): 2 bulbs total
- High-beam: often relies on the same HID lamp in Bi‑Xenon designs or may use a separate halogen bulb in some markets
In this configuration, there are two dedicated HID bulbs for the low beams, with the high-beam arrangement varying by system. Always verify the specifics for your vehicle, since regional differences and production changes can alter the exact bulb count and type.
Summary
For the 2010 C300, bulb counts depend on the headlight option chosen at purchase. Halogen-equipped cars typically use six front bulbs (two H7 low beams, two H1 high beams, two H11 fog lights). Models with bi‑Xenon HID headlights generally use two HID bulbs for the low beams, with high-beam configuration varying by headlamp design and market. To be certain, consult your owner's manual or inspect the headlamp assemblies on your vehicle, as variations exist across regions and production years.
Additional bulbs for tail lights, rear signals, interior lighting, and dash illumination are separate from the front-headlight count described here.
Do I need H11 or 9005?
H11 bulbs are designed for use as low beam headlights, while 9005 bulbs are typically used for high beams. This results in a higher brightness level for the 9005 bulbs compared to the H11 bulbs.
What is the low and high beam bulb headlight bulb type for a 2010 Mercedes C300?
Mercedes-Benz C300 (2008-2010) Bulb Size Chart
| Headlights (High Beam and Low Beam)(W/O Xenon headlight) | H7 |
|---|---|
| Headlights (High Beam) | H7 |
| Headlights (Low Beam) | H7 OR D1S |
| Front Fog Lights | H11 (H8 H9) OR H7 |
| Rear Fog Lights | 1156 (BA15S P21W) |
What bulbs does Mercedes use?
The following bulbs can be replaced.
- Halogen headlamps.
- Turn signal light: PY 21 W.
- Main beam: H7 55 W.
- Dipped beam: H7 55 W.
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.