6 Cylinder M103 M104 CIS Fuel Delivery FID Overhaul Kit

For 1988 to 1993 M103 and M104 CIS powered cars (W201, W124, R129 and W126 chassis)

Most 1988 to 1993 6 cylinder CIS fuel injection delivery (FID) systems are old and tired and have not been properly maintained. These include the W201 190E 2.6, the W124 260E 300E, 300CE, 300TE, the W126 300SE, and 300SEL, and the R129 300SL. ( NOTE: Many 1986 and 187 models only had one fuel pump - check to see what you have and advise us). In recent years, Kent has yet to see one of these cars where the complete system has been redone. He has seen pumps and filters changed, but it seems the fuel hoses are often overlooked. Ruptured fuel hoses are a real fire hazard. When this system starts to wear out you will have numerous engine performance problems due to poor and or / erratic fuel flow and pressure delivery to the engine. In the video below Kent will explain what is included in the kit, what you will need to fabricate or source yourself.

6 Cylinder M103 M104 CIS Fuel Delivery FID Overhaul Kit
Free Add-Ons Included:

How to Safely Drain the Gas Out of a W116, R107, W126, W201 and W124 - On-Demand Video

1986 to 1991 R107 and W126 Fuel Delivery Overhaul Kit Installation Instructions - On Demand Video

How to Test Your Fuel Accumulator - ON DEMAND VIDEO

1976 to 1993 CIS Fuel Injection Trouble Shooting Guide

Product Details

Kit shown and explained

PLEASE NOTE: The accumulator is NOT included in this kit as shown in the video. Price has been adjusted and the accumulator can be purchased separately below if you need it.

These cars deserve the best parts and the best maintenance. We don't skimp on this kit to make it appear "cheap." We provide you will all the key quality components - both Bosch fuel pumps, new German Filter, along with high-quality hoses and clamps you can use to complete the overhaul. 

The full kit includes the following:

  • 2 new Bosch fuel pumps
  • New German fuel filter
  • 1/2 inch hose plug
  • Fuel hoses and hose clamps as shown
  • Copper washers for banjo fittings
  • 4 new rubber shock mounts with locking 5mm nuts
  • Video instructions by Kent ( W126 V8 shown buy very similar)

You will receive two on-demand videos that will be placed in your account to view online. One will cover general principles on how to drain the fuel out of your fuel tank (example from a 380SL). The other video will cover removing and rebuilding an FID from a 1986 420SEL with a V8 engine. Even though this is a V8 the system and principle are the same ( except for some fuel hoses. 

There are some additional things you should consider if you plan on doing this job: If you suspect your fuel tank is "dirty," best you remove the fuel tank screen and drain the tank. Contaminated fuel is the number one reason for early fuel pump failure. The tank screen requires a special took to remove it while the fuel tank is still in the car. See related products to purchase the tool and filter screen separately. 

IMPORTANT NOTE: This kit does NOT cover any factory-swedged fuel hoses as explained in the video above. Please watch that video for precise details. We are just not able to provide factory hoses for every model as they do vary.  You will be able to "fabricate" most of the hoses with the materials provided in the kit as shown in the instructional videos. You can order any "special" factory hoses from a Mercedes dealer.

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