Mercedes 300SDL Turn Signal Relay Parts

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Mercedes 300SDL
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Electrical, Lighting and Body
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Turn Signal Relay
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Multi-Purpose relay, uses may include turn signal/flasher relay, windshield wiper motor, heated rear window and trailer coupling.
1986, 1987 Mercedes 300SDL
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Leaves closest warehouse today if ordered before 2 PM MST.
$90.99
Reg
$94.78
List
$90.00
1986, 1987 Mercedes 300SDL
Ships Today
Ships Today Information Icon
Leaves closest warehouse today if ordered before 2 PM MST.
$71.99
Reg
$74.99
List
$92.00

The average cost of a Mercedes 300SDL turn signal relay is between $71.99 and $90.99.

Where Is The Mercedes 300SDL Turn Signal Relay Located?

You’ll usually find the Mercedes 300SDL turn signal relay tucked behind the passenger side kick panel or somewhere near the fuse box under the hood. It never seems to sit in plain sight. Instead, you might need to take off a few covers or even move some wires to catch a glimpse of it. Most owners end up following diagrams or flipping through repair manuals just to be sure they’re working on the right part. Sometimes, there are no labels left on the relay—making it easy to mix up with one of its neighbors. If you’re stuck, looking up the relay part number and comparing your old one with the new one usually sets things straight.

What Are Common Symptoms Of A Failing Mercedes 300SDL Turn Signal Relay?

If your Mercedes 300SDL turn signal relay starts to act up, the signs aren’t too subtle. Your turn signals may quit blinking, flicker for a second, or just stay on without cycling. Sometimes you’ll flip the stalk and nothing happens, not a click or even a light on the dash. Other times, the indicator light comes on but refuses to flash. Some people hear a new, rapid clicking sound, even when their bulbs are good. On the odd day, your headlights might even join in the dance when you use the turn signal, which points to a short inside the relay. Sometimes, hazards get caught up in the mess too. Putting in a new relay usually brings everything back to normal.

How Do You Replace A Faulty Mercedes 300SDL Turn Signal Relay?

To swap a Mercedes 300SDL turn signal relay, the first step is always disconnecting the battery. Then, find the relay itself behind the trim or beside the fuse box. Some trim pieces or panels will need to come off. Once you’ve got a clear shot, all you have to do is pull the old relay from its socket and plug in the fresh one. There’s no tricky wiring to mess with, but you’ll want to double-check part numbers and connector pins to avoid any mix-ups. When you’re done, hook the battery back up and test your signals before you put the trim back. Relay failures are rare—if you fix it once and it fails again, start looking for other electrical bugs.

What Causes The Mercedes 300SDL Turn Signal Relay To Fail?

Most of the time, Mercedes 300SDL turn signal relay issues boil down to ordinary wear. These parts work hard every time you turn or signal, so after years on the road, contacts inside wear down or corrode. Moisture sometimes finds its way inside as well, speeding up the process. Some relays surrender when the wiring harness or connections become crusty or loose. Bad alternators or batteries can also spike voltage and burn out a relay. Always double-check bulbs and fuses before you blame the relay, but if you notice the signals getting a bit weird with age, a tired relay is usually to blame.

Is The Mercedes 300SDL Turn Signal Relay The Same As Hazard Relay?

While the Mercedes 300SDL turn signal relay and hazard relay can show up next to each other and look a lot alike, they don’t always do the same job. Most of the time, each one controls a separate circuit and uses different wiring. Some model years mash both jobs into one relay, but this isn’t common for every car. If you aren’t sure, check your car’s wiring diagram or find the relay number before swapping anything out. Mixing up these relays can bring on fresh problems, so always double-check your model’s details before making a switch.

Why Choose AutohausAZ For Your Mercedes 300SDL Turn Signal Relay?

Buying your Mercedes 300SDL turn signal relay from AutohausAZ gives you more than just a piece of hardware. You get solid deals on parts, so you don’t end up spending more than you need. Their shipping is quick and steady—handy if your car’s just sitting in the driveway flashing one direction. If something’s wrong with the part or it doesn’t fit, they’ll sort it out, no hassle. The site’s easy to use, and the folks behind the screen are ready to help if you get stuck. With AutohausAZ, you know you’ll save some cash and get what you need, without a headache. It’s a reliable way to keep your Mercedes on the road, no matter what crops up next.