1978 Mercedes-Benz 300SD Electrical Parts

Essential Electrical Parts for 1978 Mercedes-Benz 300SDs

Carquest Premium – Electric Fuel Pump Inertia Switch (Part No.SBA4426)

Electric Fuel Pump Inertia Switch

from

$84.99
CARQUEST premium engine management products provide the right products for a wide range of domestic and import applications. Delivering the highest performance and durability under demanding conditions.
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Littelfuse – Fuse – Blade Type (A (Part No.4K1001673625LTL)

Fuse - Blade Type (A

from

$3.83
Fuse – Blade Type (A

Littelfuse – Fuse – Maxi Blade 32V 50A: 50 Amp, Red, Maxi, 1 Pack (Part No.MAX50)

Fuse - Maxi Blade 32V 50A: 50 Amp, Red, Maxi, 1 Pack

from

$4.29
MAXI uses “Diffusion Pill Technology” to provide predictable time delay characteristic and low heat dissipation. MAXI Fuses are primarily used for under hood applications and are products with a high temperature polymer and silver plated blades. Replace commonly used fusible wire or fusible link to protect a high current segment or system of the wiring harness. Ideal for motor powered applications which have large inrush currents. Littelfuse, founded in 1927 and headquartered in Chicago, is an industrial technology manufacturing company empowering a sustainable, connected, and safer world. Across more than 15 countries, and with 17,000 global associates, we partner with customers to design and deliver innovative, reliable solutions.

Product Features:
  • MAXI uses “Diffusion Pill Technology” to provide predictable time delay characteristic and low heat dissipation
  • MAXI Fuses are primarily used for under hood applications and are products with a high temperature polymer and silver plated blades.
  • Replace commonly used fusible wire or fusible link to protect a high current segment or system of the wiring harness.
  • Ideal for motor powered applications which have large inrush currents.
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Bosch – Fuse (Part No.P2010397076BOS)

Fuse

from

$1.39
Bosch is one of the largest global suppliers of automotive products, developing, manufacturing and supplying precision OE components and systems to vehicle manufacturers and the automotive aftermarket.
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Littelfuse – Fuse – Ceramic (Part No.4K2001867016LTL)

Fuse - Ceramic

from

$3.42
Fuse – Ceramic

Dorman – High Temperature Lighting Harness (Part No.645-998)

High Temperature Lighting Harness

from

$21.29
Dorman offers a comprehensive line of Headlamp Sockets for almost any automotive electrical repair. All our Headlamp Sockets are constructed of high-quality materials for long-lasting durability.

Product Features:
  • Available in many different wire configurations including 1-, 2-, and 3-wire
  • A large selection available to support a variety of bulbs, including H7, 9005, 9006 and more
  • Durably designed for a long service life
  • Also suitable for a broad range of industrial and commercial uses
See More

Bosch – Relay (Part No.P202032107BOS)

Relay

from

$8.81
Bosch is one of the largest global suppliers of automotive products, developing, manufacturing and supplying precision OE components and systems to vehicle manufacturers and the automotive aftermarket.
See More

APA/URO Parts – Relay (Part No.P2020186983APA)

Relay

from

$44.07
Relay

Meyle – Relay (Part No.P202025016MEY)

Relay

from

$31.77
Relay

Upgrade your 1978 Mercedes-Benz 300SD with Top-Quality Electrical Parts

When it comes to maintaining or upgrading your 1978 Mercedes-Benz 300SD, nothing is more important than using high-quality OEM or aftermarket parts that you can trust. Whether you’re repairing damage to your Mercedes-Benz or enhancing its overall performance, Electrical Parts are key to keeping your 300SD functioning at its best. At Advance Auto Parts, we offer a wide selection of 6 Electrical Parts for the 1978 Mercedes-Benz 300SD, designed to meet your needs without breaking the bank. From Switches, Sensors & Relay replacements to Wire Connectors upgrades, we’ve got you covered with parts that fit your vehicle perfectly and ensure long-lasting performance.

Affordable Prices and Wide Selection

Shopping for Electrical Parts for any vehicle can be a hassle, especially if you’re on a budget. But with Advance Auto Parts, you can find high-quality Electrical Parts for your 1978 Mercedes-Benz 300SD at great prices. Our Electrical Parts inventory for this model ranges from just $1.39 to $84.99, with an average price of $25.28. Our 6 Electrical Parts in stock come from 5 trusted brands, so you’re sure to find the right part for your 1978 Mercedes-Benz 300SD without overspending.

Explore Related Parts and More

While you’re here, don’t forget to check out other essential categories that go hand in hand with Electrical Part upgrades. Explore related part types like Batteries and Chargers, Oil and Lubricants and more to make sure your 1978 Mercedes-Benz 300SD is always ready to roll. We’re committed to providing you with everything you need to keep your 300SD in top shape, all in one place. Start shopping confidently below for your 1978 Mercedes-Benz 300SD!

Best-Selling Switches, Sensors & Relays for 1978 Mercedes-Benz 300SDs

Enhance the driving experience in your Mercedes-Benz with 2 quality Switches, Sensors & Relay components, starting at $8.81.

Meyle – Relay (Part No.P202025016MEY)

Relay

from

$31.77
Relay

Bosch – Relay (Part No.P202032107BOS)

Relay

from

$8.81
Bosch is one of the largest global suppliers of automotive products, developing, manufacturing and supplying precision OE components and systems to vehicle manufacturers and the automotive aftermarket.
See More

Most Popular 1978 Mercedes-Benz 300SD Wire Connectors

Customize your Mercedes-Benz with 1 Wire Connectors products like Multi Purpose Wire Connectors, all priced under $21.29.

Dorman – High Temperature Lighting Harness (Part No.645-998)

High Temperature Lighting Harness

from

$21.29
Dorman offers a comprehensive line of Headlamp Sockets for almost any automotive electrical repair. All our Headlamp Sockets are constructed of high-quality materials for long-lasting durability.

Product Features:
  • Available in many different wire configurations including 1-, 2-, and 3-wire
  • A large selection available to support a variety of bulbs, including H7, 9005, 9006 and more
  • Durably designed for a long service life
  • Also suitable for a broad range of industrial and commercial uses
See More

Top Picks for 1978 Mercedes-Benz 300SD Fuses

Upgrade Mercedes-Benz 300SDs with top-quality Fuses parts, including 2 OEM and aftermarket selections for your 1978 model.

Littelfuse – Fuse – Ceramic (Part No.4K2001867016LTL)

Fuse - Ceramic

from

$3.42
Fuse – Ceramic

Bosch – Fuse (Part No.P2010397076BOS)

Fuse

from

$1.39
Bosch is one of the largest global suppliers of automotive products, developing, manufacturing and supplying precision OE components and systems to vehicle manufacturers and the automotive aftermarket.
See More

In-Demand Driving Safety Monitoring System Parts for 1978 Mercedes-Benz 300SDs

Select from 1 premium Driving Safety Monitoring System Parts parts for your 1978 Mercedes-Benz 300SD.

Carquest Premium – Electric Fuel Pump Inertia Switch (Part No.SBA4426)

Electric Fuel Pump Inertia Switch

from

$84.99
CARQUEST premium engine management products provide the right products for a wide range of domestic and import applications. Delivering the highest performance and durability under demanding conditions.
See More

FAQs for 1978 Mercedes-Benz 300SD Electrical Parts

Which Electrical Parts are best-sellers for 1978 Mercedes-Benz 300SDs?

Out of 6 Electrical Parts that fit 1978 Mercedes-Benz 300SDs, the following parts are the top sellers:

What’s the price range for 1978 Mercedes-Benz 300SD Electrical Parts?

Electrical Part prices for the 1978 Mercedes-Benz 300SD start at $1.39 and go up to $84.99 for the most premium parts.

What’s the average price of a Electrical Part for a 1978 Mercedes-Benz 300SD?

The average price for Electrical Parts for the 1978 Mercedes-Benz 300SD is $25.28. Keep in mind the variety of part types within our Electrical Part category so you are likely to find a wide range of prices across a variety of parts and components.

Does Advance Auto Parts sell Electrical Parts for other Mercedes-Benz 300SD model years?

Yes, we currently carry Electrical Parts for 9 model years of Mercedes-Benz 300SDs between 1979 and 1993. Electrical Parts are bought most frequently for the following model years: 1993, 1992, 1985, 1984, 1983, 1982, 1981, 1980, and 1979.

What are the cheapest Electrical Parts for my 1978 Mercedes-Benz 300SD?

The cheapest 1978 Mercedes-Benz 300SD Electrical Parts we carry in stock are:

What types of Electrical Parts do you sell for my 1978 Mercedes-Benz 300SD?

As of 2/5/25, these are some of the most in-demand types of Electrical Parts for a 1978 Mercedes-Benz 300SD:

Can I get help with 1978 Mercedes-Benz 300SD Electrical Part orders?

Contact our customer support team, by chat or phone, through the help desk page, where you can find instant answers about Mercedes-Benz Electrical Parts and more.

What is your return policy for Mercedes-Benz 300SD Electrical Parts?

Advance Auto Parts keeps returns simple. For new Mercedes-Benz 300SD Electrical Parts and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.