Mercedes 300TDT Diesel Injector Parts

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This hose is fuel rated (EFI) with internal string reinforcement but no external braiding. Sold by the meter, please specify length in quantity of meters.
1987 Mercedes 300TDT
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$37.99
Reg
$39.57
List
$32.50
OEM
1982, 1983, 1984, 1985 Mercedes 300TDT
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$51.99
Reg
$54.16
List
$285.50
OEM
If replacing original metal version, also need 1162760929 vacuum connector and 1170780281 vacuum line. 1 per car.
1987 Mercedes 300TDT
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$36.99
Reg
$38.53
List
$33.50
1 per injector.
1982, 1983, 1984, 1985 Mercedes 300TDT
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$2.39
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$2.49
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$4.70
1 per injector.
1985, 1986, 1987 Mercedes 300TDT
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$1.79
Reg
$1.86
List
$5.00
OEM
1982, 1983, 1984, 1985 Mercedes 300TDT
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$1.69
Reg
$1.76
List
$4.70
OEM
1 per car.
1982, 1983, 1984, 1985 Mercedes 300TDT
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$4.59
Reg
$4.78
List
$3.20
OEM
1982, 1983, 1984, 1985 Mercedes 300TDT
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$0.89
Reg
$0.93
List
$1.90
Diesel delivery valve seal, upper.
1987 Mercedes 300TDT
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$0.69
Reg
$0.72
List
$1.00
OEM
2 per solenoid.
1982, 1983, 1984, 1985 Mercedes 300TDT
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Leaves closest warehouse today if ordered before 2 PM MST.
$2.89
Reg
$3.01
List
$3.70
1987 Mercedes 300TDT
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Leaves closest warehouse today if ordered before 2 PM MST.
$1.89
Reg
$1.97
List
$5.00

The average price of a Mercedes 300TDT diesel injector is between $0.69 and $51.99.

What Are Signs Of A Failing Mercedes 300TDT Diesel Injector?

Problems with a Mercedes 300TDT diesel injector don't always leap out at you. Sometimes, the engine shakes or stumbles, especially at idle. Starting up in the morning feels like a slow chore, or you notice extra smoke coming from the exhaust, even with light throttle. Many folks point out black smoke when hitting the gas, which usually means extra fuel isn’t burning like it should. If you’re struggling with sluggish acceleration or random misfires, an injector may be sticky or blocked. Fuel odors under the hood and wet marks near the injectors are clear hints something isn’t right. Catching these red flags early can save your engine from bigger headaches later.

How Can I Test A Mercedes 300TDT Diesel Injector At Home?

Testing a Mercedes 300TDT diesel injector at home takes a careful eye and a patient ear. Pop the hood and scan each injector for wetness or diesel leaks. With the car running, listen for knocks or odd ticks around the injectors—a stethoscope makes it easier, but a piece of hose to your ear works in a pinch. Some backyard mechanics use the “crackline” trick: loosen the fuel line nut at each injector, one at a time, with the engine at idle. Each time you do this, the idle should dip or stumble. No change at all? That injector likely has issues. Pulling injectors for a spray check is possible but messy, and way more involved. When in doubt, having a pro confirm your findings helps avoid costly mistakes.

How Often Should I Replace Mercedes 300TDT Diesel Injector Nozzles?

A Mercedes 300TDT diesel injector nozzle will soldier on for many miles, but not forever. Most mechanics suggest giving the nozzles a close look every 100,000 miles, especially if you use regular diesel instead of premium. If the spray pattern looks weak or uneven, or if the car lags and smokes, changing the nozzles often brings things back in line. Sometimes injectors respond well to ultrasonic cleaning or a rebuild, but heavy wear calls for full replacement. Clean fuel and regular filter swaps stretch the lifespan, yet age and hard use eventually catch up with every injector in the lineup.

What Causes Mercedes 300TDT Diesel Injector Leaks?

A Mercedes 300TDT diesel injector will start leaking if its seals or washers wear out. Each time the engine heats up and cools down, rubber and copper parts harden, flatten, or crack. Sometimes, shoddy installation or poor fuel clogged with grit can eat away at the small parts inside, making leaks more likely. Vibration from rough running puts added pressure on the injector’s body and seal, showing up as damp patches or diesel smells under the hood. Catching small leaks fast keeps fuel bills low and stops a bigger mess from building up. Keeping up with maintenance, and swapping out seals or washers when needed, usually keeps these issues in check.

Should I Clean Or Replace My Mercedes 300TDT Diesel Injector?

Choosing between cleaning or swapping out a Mercedes 300TDT diesel injector depends on its shape. Light gumming or some carbon means a pro cleaning might get the job done and avoid a big bill. However, if you see lots of metal wear, rust, or a bad spray, a new or rebuilt injector is the safer play. Don’t get caught trying to clean an injector that's already toast—a quick fix can lead to repeat failures and more work down the road. For high-mile cars, ask about rebuilding injectors with new nozzles and seals. Stick with quality replacements, and regular maintenance pays off in smoother starts and better power.

Looking For The Best Mercedes 300TDT Diesel Injector?

At AutohausAZ, we know how important it is for your Mercedes 300TDT to run at its best, and finding the right diesel injector shouldn't be stressful or expensive. That's why our team works hard to offer you high-quality Mercedes 300TDT diesel injectors at prices that are tough to beat. We keep our costs low, so you don't have to break the bank to keep your car on the road where it belongs. When you shop with us, you can expect quick shipping right to your door, so your garage projects don’t have to wait. If for any reason you get the wrong part, our returns process is straightforward and hassle-free, taking the worry out of shopping online. We want you to feel confident, so our site is easy to use, our product listings have all the details you need, and our service team is always ready to help if you have questions about fitment or installation. We’re car people too, and we’re dedicated to taking care of your vehicle with the same care we’d give our own. Shopping with us means you get the parts you need, like that crucial diesel injector for your Mercedes 300TDT, at the right price and with service you can trust every step of the way.