Mercedes-Benz 240D Speaker Size
Speaker size, type, and location chart for Mercedes-Benz 240D models from 1974 to 1983 production years.
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Dashboard Speaker
| Years | Type | Size (inch) |
|---|---|---|
| 1974 - 1983 | Midrange | 4 |
Rear Deck Lid Speaker
| Years | Type | Size (inch) |
|---|---|---|
| 1974 - 1983 | Midbass / Full-Range | 5.25 |
Mercedes-Benz 240D Speaker FAQ
What speakers should I replace first in my Mercedes-Benz 240D?
Replace the 5.25-inch rear deck speakers first. They handle most of your bass and midrange output - around 80% of what you actually hear while driving. The 4-inch dashboard speakers are more for fill and high frequencies. Rear deck location gives you better power handling, typically 50-75 watts RMS versus 25-40 watts for the dash units. The Mercedes-Benz 240D's rear deck position also means less road noise interference.
Can I install component speakers in the Mercedes-Benz 240D rear deck?
Yes, but you'll need to mount the tweeter separately. The rear deck supports component systems because there's enough space for crossover placement. Most installers mount the tweeter in the rear parcel shelf or drill new holes. Component speakers around 4-8 ohms work well here. You get better imaging than coaxials... though in a rear deck position the benefits are somewhat limited compared to door installation.
What's the difference between coaxial and full-range speakers for the 240D dashboard?
Coaxial speakers have a separate tweeter mounted on the woofer - better high frequency response above 3kHz. Full-range drivers use the same cone for all frequencies, which can sound muddy in the upper ranges. For the Mercedes-Benz 240D's 4-inch dashboard location, coaxials typically offer clearer vocals and detail. The power difference isn't huge though - both usually handle 25-35 watts RMS in this size.
Will 6.5-inch speakers fit in the Mercedes-Benz 240D rear deck?
Probably not without modification. The factory 5.25-inch cutouts are roughly 5.5 inches in diameter. Going to 6.5 means cutting metal and possibly relocating mounting points. Depth could be an issue too - rear deck space varies but is often limited to 2-3 inches. Stick with 5.25-inch replacements. You'll get similar output anyway, maybe 2-3dB difference at most.
How many ohms should replacement speakers be for the 240D?
4-ohm speakers work best with the Mercedes-Benz 240D's factory amplification. The original system expects this impedance load. 8-ohm speakers will play quieter - roughly half the power output. Some people use 2-ohm speakers but that might stress the head unit's amplifier section over time. Most quality aftermarket speakers come in 4-ohm versions anyway.