Search | W116 | D-Jetronic Fuel Injection

Displaying 1 - 13 of 13
$389.00

1972 to 1975 W116 D-Jetronic Complete Fuel Delivery System w/ Detailed Instructions

Upgrade your EFI 350SE, 450SE, 450SEL fuel pump, install a new filter, and replace mounts and all rubber hoses.

If you own or plan to purchase an older W116 with D-Jetronic (electronic) fuel injection, Kent can almost guarantee you will need this kit. Even if the filter has been changed, the pump, hoses, and other parts that can leave you stranded on the open road have not. You CAN do this yourself.

On Demand Video
$8.99

D-Jetronic Pressure Tester Hook-up - Now Two Options - On Demand Video

I will show you the two different ways to you hook up the tester to the fuel rail

As of June 14, 2026, I will include an additional attachment in my D-Jetronic Fuel Injection Pressure Test kit. This will allow you to avoid pulling the hose of the cold start injector if you so choose.

$47.95

1970 to 1975 F.I. V8 Fuel Filter with Custom Banjo Bolt Fitting

For models with D-Jetronic Fuel Injection systems that have the original fuel delivery system still intact.

Original fuel filters for these models do NOT come with the right-angle fitting that attaches to the filter inlet (see pictures below). On some occasions, this fitting is missing or rusted beyond use. In that case, you will need a new fitting, but the original fittings are no longer available.

On Demand Video
$14.99

D-Jetronic Fuel Injectors: How to Wire New Plugs and Install New Boots

On-Demand Video to help you do it yourself. For peak performance this is an important job

In Kent's 32-minute video on rewiring the plugs on your D-jetronic fuel injectors, he will walk you through the two options on how you can use this kit - then show you how in do it and finally give you some tips on automotive wire splicing using the best tools and supplies.

$42.00

1970 to 1975 D-Jetronic Fuel Injector Rewiring Kit w/ Silicone Boots

It can be used on BOTH original Bosch Injectors or on the new aftermarket injectors we sell. Watch the video for details

On most D-jetronic engines, the fuel injector wiring plugs are hard and brittle, and the boots are torn or missing altogether. You may say, "If it is working, why fix it? Watch the videos below to understand why this is important and how easy it would be for you to do it yourself.

$24.95

1970 to 1975 3.5 4.5 D-Jetronic Fuel Filter Inlet Special Fitting

This is your best option if the original fitting is lost or rusted so badly you can not re-use it.

The original fuel filter has a rigid right-angle fitting, as shown in the pictures below. We do not provide this fitting in our fuel delivery kits as more often than not it can be removed from your old filter and installed in the new filter we provide.

$64.95

1970 to 1975 3.5 4.5 D-Jetronic Fuel Injection Pressure Tester w/ Video Instructions

ACCURATE tester with a 60 psi liquid-filled gauge and CORRECT fittings to hook into hose up to the fuel rail. Now with pressure release capture bottle attached.

Testing fuel pressure is a simple procedure on the D-Jetronic engines, but it is ABSOLUTELY essential. If your fuel pressure is off even a few pounds, it will dramatically change the fuel mixture, and your engine will end up running too rich or too lean.

On Demand Video
$12.99

How to Install New Fuel Injectors in a 1970 to 1973 3.5 or 4.5 V8 Engine - On Demand Video

You might be surprised by the difference these will make in your old D-Jetronic fuel-injected engine. Most are over 50 years old!

In this 23-minute step-by-step "how-to" video, Kent will show you how to install a new set of fuel injectors in your early D-Jetronic engine. This video is included free with the purchase of our early 3.5 and 4.5 fuel injector sets. 

The subjects included are:

$52.50

Late 4.5 D-Jetronic Fuel Injector Special Seal Set

Used on some 1973 and all 1974 and 1975 V8 fuel-injected engines. You must confirm before ordering by removing one of your injectors.

If you plan to replace, test, or service your electronic fuel injectors you first must determine which bottom seals you will need. If you have a 1970 or 1973 model, you most likely have the single-bottom seal (unless your engine has been changed).

$262.00

Late 1974 and 1975 450SL, 450SE and 450SEL New Fuel Injectors Less Bottom Seals

This kit DOES NOT include the lower green and black seals. It also does not include the nylon sleeves, which is no longer available NLA.

DO NOT ORDER UNTIL YOU REMOVE ONE INJECTOR IN YOUR ENGINE AND INSPECT THE HOLE. Sometime in 1974, Mercedes changed the way these injectors were sealed into the head to prevent air leaks. A "YELLOWISH" nylon sleeve was added along with two seals on the lower end of the fuel injector.

$19.85

1970 to 1975 D-Jetronic Fuel Injector Wiring Plugs for NEW Injectors x 8

If you are installing our NEW injectors, these wires are a good option if your old wire plugs are rotten and breaking up. These will need to be wired into your existing harness.

These plugs will NOT work on your original injectors. They will ONLY work on our new replacements (see below). These plugs are a good alternative to the damaged originals on your D-Jetronic fuel-injected engine only if you are installing our new injectors.

$28.00

1970 to 1975 D-Jetronic V8 EFI Fuel Injector Tip and Housing Seals

To prevent intake air leaks, replace your aging tip seals and large body seals. You should always replace with new anytime you remove the injectors.

These are the critical seals that go on the D-jetronic fuel injectors. If they leak air, your engine with idle high, start poorly and run lean, which can damage the pistons. We recommend you replace these whenever you remove and replace the injectors.

$282.00

1969 to 1971 3.5 D-Jetronic New Replacement Fuel Injector Set with Extras

NOT FOR 350SLs. Many had 4.5 engines in them! The injectors come with bonus new seals and upper clamps. Kent's on-demand video on D-jet fuel injector replacement is included free of charge.

These will fit W108, W109, and W111 with the very early 3.5 V8 engines only. WARNING: MAKE CERTAIN your current injectors are yellow at the top. A restocking fee will apply if you pl