Search | W108 W109 | Fuel Delivery

Displaying 1 - 45 of 45
On Demand Video
Mercedes Short Fuel Pump Instructions - On Demand Video

1963 to 1973 Short MFI Electrical Fuel Pump Lower Section Resealing Instructions - On Demand Video

Be sure your Mercedes has the "short" style fuel pump. Not all models in those years had one (see description)

MFI (mechanical fuel injection) fuel pumps are notorious for leaking fuel. Leaks are almost always due to age hardened and deformed o-rings inside the pump. Taking the pump off the car, taking it apart, cleaning it and installing new seals will almost always solve the fuel leak problems.


1960'S Through Mid 1970's Fuel Tank Filter Screen Removal Tool

For W110 W111 W112 W113 W108 W109 W114 and W115 chassis as well as W123 station wagon only

Most owners do not have a big enough hex wrench to remove the fuel tank screen on those models that had the fuel tank right under the rear trunk floor. But the screen does need to be removed, inspected and cleaned due to the age of these cars.

On Demand Video

MFI Fuel Injector Tester: Assembly, Testing and Cleaning Operations - On demand Video

A video instruction manual explaining in detail how our special tester kit works

Would you like to find out how well your old (1959 to 1972) mechancial gasoline fuel injectors are working? Now you can do it yourself at home with our custom bench mount hand pump pressure tester and cleaning kit. These are the full instructions that come FREE with the kit.


D-Jetronic Fuel Pump Protection Filter Inslallation Kit

For 1970 to 1973 W111 W108 W109 Coupes and Sedans and 1972 to 1975 R107 350SL and 450SL

Let's face it. These fuel tanks and now 50 years old and most are not squeaky clean inside. There is a fuel tank screen that will catch most particles if the screen is in good shape. But I have found that it will not catch the very fine rust particulates that are so common in these old cars.

On Demand Video

1970 to 1975 D-Jetronic Fuel Pressure Regulators: How They Work / How to Test - On Demand Video

There is a little mystery around these. I will open them up and show you how they work and what they really do.

People call these two units pressure regulators, but really only one of them is. In this xx minute video, Kent will explain how these are different, what each one does, how to adjust them, and how to test them with a hand pump vacuum tester. 

On Demand Video

How to Depressurize a D-Jetronic V8 Fuel Injection Rail - On Demand Video

This you MUST do before unhooking any hoses on your 1970 to 1975 D-jet engine or I guarantee you will get sprayed with fuel in your face!

In this 8-minute video, Kent will show you how to quickly depressurize your D-Jetronic fuel system before doing any injector service, replacing any hoses, or hooking up our fuel pressure tester.


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

Fuel Pressure testing is a must for these engines even if they are running "OK." Comes with a free depressurization kit and 3 video instructions.

6/6/23 Update: Now with a liquid filled pressure gauge installed to increase accuracy and reliability. We customize, test and recalibrate this fuel pressure tester before we ship it.


1970 to 1976 D-Jetronic Fuel System Depressurization Kit

Forget fuel pump relay, forget fuel pump fuse, forget getting under back of the car to disconnect the fuel pump. No engine cranking. No flooding cylinders with fuel. Easy 5-minute process with no spillage

This kit will put a smile on your face, especially if you have done it before the "old way." Watch the video below for full instructions on how to use this kit to do the fastest fuel system depressurization in the world!


1972 to 1975 4.5 450 D-Jetronic New Replacement Fuel Injector Set with Extras

Bonus new seals and new upper clamps included with the injectors. Kent's on-demand video on D-jet fuel injector service is included free of charge.

WARNING: MAKE CERTAIN your current injectors are blue/green at the top. Restocking fee will apply if you order in error. For the 4.5 engine only. See related products below for the 3.5. A video is worth a few thousand words.


Fuel Hose Special External Coil Wire to Prevent Kinking and Chaffing

Can be cut to 4 to 5 smaller lengths and stretched for various applications on 7mm, 7.5mm and some 8mm internal diameter fuel hose.

This can do amazing things for your new fuel hose installaton on your old Benz engine. Watch the video to learn more. Sold individually in approximately 6 inch lengths.


1970 to 1975 D-Jetronic Fuel Injector Hold Down Bolts and Washers.

New zinc plated bolts to match the original color of most Mercedes D-jet engines. See video below

Set of 8 correct size bolts and washers to spruce up the engine compartment of your D-jetronic V8 engine. Watch the videos to see how these actually look installed. 


1970 to 1975 D-Jetronic V8 Engine compartment Fuel Hose Replacement Kit

Full kit. Includes enough hose and clamps to replace all 8 rubber supply fuel hoses. DOES not include the 8 short hoses and clamps for the fuel injectors. See related below.

These engine supply fuel hoses are critical to the well-being of your engine. I have seen too many rotten and deteriorating hoses on these D-Jet engines that could easily lead to an engine fire, and they just do not get replaced when they should.

On Demand Video

1970 to 1975 D-Jetronic Fuel Injection Repair / Service Instructions - On Demand Video

A commonly neglected service that can lead to poor running and possible engine fire. It is the rubber parts that fail! See video below to believe it!

In this 36-minute instructional video, Kent will walk you through the process of doing a complete fuel hose replacement and fuel injector service on a 1970 to 1975 Mercedes V8 engine with Bosch EFI electronic fuel injection.


Bosch D-Jetronic Fuel Injector Service Kit

You will need this if you plan to remove and test or replace the EFI fuel injectors in your 1970 to 1975 Mercedes

This is the most complete 1970 to 1975 V8 injector repair kit you can find anywhere.

Currently out of stock.

Bosch D-Jectronic Fuel Injector Testing and Cleaning PARTIAL Kit

LAST ONE.For 1970 to 1975, electronic fuel injectors. A pressure tank is required. See notes below. Full kit is available if desired.

With the required pressure tank you will be able to individually test and clean our D-jet fuel injectors. Along with a 12-volt power source, you will need I gallon of cleaning fluid as described in the instructions.


8mm ( 5/16 inch ) Fuel Hose End Pugs x 4

Use when disconnecting a fuel hose to prevent spillage on your engine or floor!

You would be amazed at how much fuel can leak out of a fuel hose when you disconnect it from your tank or engine. This is an easy way to prevent messy spills.


Early Fuel Injection LONG and SHORT Electric Fuel Pump Seizure and Bottom Leak Service Kit

For 1959 to 1972 6 cylinder FUEL INJECTED gas models as well as the 6.3 V8 only If one day your fuel pump won't run, watch the video below and Kent will explain the major reason.

Rather than type up a description of this kit just watch the video below. Kent will explain what this kit includes and why it is needed. If you have a 1959 to 1973 fuel-injected Mercedes with a 6 cylinder engine (or a 6.3 V8) you should have this kit on standby!


MFI Short Fuel Pump Yellow Zinc Original Style Screws and Lock Washers

Nice touch when rebuilding your very precious fuel pump on most 1963 to 1972 fuel injected gas Mercedes

The original screws in these pumps get pretty nasty looking over time. When you try to clean them will a wire wheel the plating will be completely removed and the heads will rust again pretty quickly. Now you can install new original looking yellow zink plated screws and washers.

On Demand Video

Fuel Tank Level Sending Unit Service Kit Update - On Demand Video

For using Kent's service kit to clean the old style fuel tank sending unit. Used in congestion with original video instructions

This on-demand instructional video was filmed to go with Kent's new fuel tank sending unit service kit launched in June of 2020. This is not a complete video on the subject of fuel level sending units. For the complete video see related products below.


Fuel Tank Level Sending Unit Service Kit w/ 2 Instructional Videos

Most models 1968 to 1995 with tubular sending unit inside the fuel tank.

If your fuel gauge stops working or is not reading accurately, many times it can be repaired by removing it from the fuel tank, taking it apart and giving it a good internal cleaning of the contact points, float shaft, and wires.

On Demand Video

1970 to 1973 W108 W109 Fuel Pump Conversion Instructions - On Demand Video

Kent will show you how to use his conversion kit to build and install this in your own 3.5 or 4.5 sedan

This highly detailed 37-minute video instruction will show you how to do the following: Determine if your original pump needs replacing, drain the fuel out of your fuel tank, remove the old pump assembly, take it apart on the bench and install the new pump, filter, and hoses, and properly reinsta


1970 to 1973 W108 W109 3.5 and 4.5 Fuel Pump Conversion Kit

V8 ENGINES ONLY with D-Jetronic EFI Fuel Injection. Will not work on 6-cylinder engines (MFI). Complete with new fuel pump, filter, adapter fittings, all new fuel hoses, new clamps, new mounts and complete detailed video instructions

Since new original style pumps are no longer made, this is the best way to finally fix your old fuel pump leaks and poor performance. This kit is designed specifically for the W108 and W109 small V8 sedans.


Bosch D-JETRONIC Fuel Pump Outer Reseal Kit

For original fuel pumps on many 1969 to 1975 D-jet fuel injected cars ( Mercedes, Porsche, Alfa Romeo, Etc.) - Study the picture below carefully to make sure you have a match!

Kent has sourced 2 special Viton o-rings for the outer pump housing on these early djetronic Bosch electric fuel pumps. There are two orings that harden with age causing the pump to leak fuel at the outer end of the pump.


Early MFI Mechanical Gas Fuel Injector Cleaning and Testing Conversion Add-On Kit

You MUST HAVE a version 3 pressure tester ( either diesel or CIS) to make this kit work on most 1959 to 1972 Bosch Mechanical ( NOT ELECTRIC) fuel injectors

We know that many of you own multiple Mercedes, including both gas and diesel models. If you own one of Kent’s fuel injector pressure testers you no doubt will want to test all your applicable mechanical fuel injectors in both types of older engines.


Early Gas and Diesel Fuel Injection Pump Oil - High Moly Content

Most often these oil checks and changes are ignored. Injection pumps are very expensive. You need a very strong oil to minimize wear.

NOTE: Ships UPS ground only. Select ground for entire order to save in shipping costs. I am a great fan of LubroMoly products.

On Demand Video

Early Gas Engine Fuel Injector Back Flush Cleaning Instructions - On Demand Video

Video is free with purchase our DIY backlash cleaning kit - works on mechanical gas injectors from the late 50's to early 90's

This 24 minute on demand training video comes with our injector back flush cleaning kit. You can purchase this video separately, but please keep in mind you will not have any of the tools or supplies to complete this procedure yourself.


Early Gas Engine Fuel Injector Back Flush Cleaning Kit

Works on Bosch MFI and CIS mechanical fuel injectors from the late 1950's to early 1990's. Will NOT work on electrically operated fuel injectors.

With these old gas fuel injectors, sometimes you just have to "back flush" the insides to restore them to peak performance. There is no guarantee that back flush cleaning will restore every old gasoline mechanical fuel injector. Some are just plain worn out.


1963 to 1973 Short Bosch MFI Electrical Fuel Pump Complete Resealing Kit

Replacement motor brushes and new yellow zinc screws included

These early “short style” electric fuel pumps are very prone to leaking fuel because the rubber case o-ring seals harden with age. New pumps are no longer available and rebuilt are VERY expensive!  If you risk buying a used one it will probably end up leaking or seeping fuel too.


Best Grabbing and Clamping Hand Tool Set in The World - Kent’s Collection

3 super custom tools that you will not find anywhere else in the world. All designed by Kent Bergsma

This is a collection of SPECIAL tools Kent has put together to help you grab, twist, and pull on things in and around your Mercedes.  He makes each one of these tools right here in his shop.


Fluid Maintenance - Radiator and Fuel Hose HD Pinch off Pliers

A must when changing rear mount fuel filters and pumps. Best tool for secure clamp-off in tight locations. Works on fuel hose, coolant hose and even big radiator hose.

I have used a lot of different clamping tools over the years to prevent fluids from leaking out when removing coolant, fuel, or brake fluid hoses. Most work ok. Some are hard to use in tight places.  Many do not stop every last drip from coming out of the hose.

German hose clamps set 12

Super Fuel Hose Clamp Kit (12) - German Made - High Torque

Non Cutting and smooth tightening clamps

These are my favorite German hose clamps. They tighten securely, dont cut into the hose, and don't rust or break. If you are working on the fuel system of any Mercedes I recommend you have these clamps on had.


Gas and Diesel Fuel Hose Clamp Off Tools

Ouality Lisle brand. Sold in pack of two.

Applies to all Mercedes: Pre 1960, 190SL, 110, 111, 112, 113, 114, 115, 108, 109, 107, 116, 123, 126, 201 and 124 chassis. If you ever need to replace a fuel tank, fuel pump, fuel filter, or fuel hose and don't want the fuel running down your arm here is the tool and will save the day!