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$72.95

K-jetronic Warm Up Regulator WUR Single Vacuum Rebuild Kit

The highest quality and most complete kit available.

IF YOU ORDER THIS IN ERROR, IT IS NOT RETURNABLE. Watch the video below to determine which WUR you have BEFORE ordering. This ONLY works on single vacuum units!!!  You will find the quality of this kit is impressive, and it has things in it that other kits do not have.

$56.95

Early K-Jetronic NON Vacuum Type Warm Up Regulator Rebuild Kit

Make sure your engine has this type of WUR before ordering. Study pictures closely below.

This WUR is very simple in design and has no internal diaphrams. It is also quite short compared to the other types. No instructions are included, but they are readily available on the internet by doing some google searches.

$68.00

M110 K-Jetronic Warm-UP Regulator Relocation Kit

For most twin cam 6-cylinder fuel injected engines from 1977 to 1985 - Re-mount the WUR where you can easily get to it.

This is a builder's kit and will require fabrication on your part. That means strap bending, location testing, bracket drilling, and WUR mounting. The kit comes with Kent's video instructions on how to do this and on how to hook up the electrical connector, vacuum hose, and two fuel lines.

$48.85

1976 to 1985 K-Jetronic Warm-Up Regulator (WUR) Diagnostic Test Kit

Use in conjunction with a CIS fuel pressure tester to determine if your WUR is healthy and working properly.

PLEASE NOTE BEFORE ORDERING:  This WUR function test kit is INCLUDED in both 1976 to 1985 6-cylinder and  V8 full pressure test kits (see related products below). There is no need to order this separately.

$127.60
Currently out of stock.

K-jetronic Warm Up Regulator WUR Double Vacuum Rebuild Kit

This WUR has two vacuum connections on the bottom. The highest quality and most complete kit available.

This style of WUR started showing up in the late 1970's. It was not installed on all vehicles. You have to look at the WUR on your engine to determine what you have. You can not go by year and model. IF YOU ORDER THIS IN ERROR, IT IS NOT RETURNABLE.

$28.75

K-jetronic Warm Up Regulator Cold Start Modification Kit w/ Video Instructions

A good mod to make if you are rebuilding your WUR. Will allow you to adjust cold start pressure up or down without having to take the unit apart repeatedly.

Before you make this modification, you should be very familiar with the function of the WUR and how its pressure adjustments affect the performance of the K-Jetronic fuel injection systems. The tools and supplies offered in this kit will allow you to modify your warm-up regulator at home and in y

$174.95

1976 to 1985 V8 K-Jetronic Fuel Injection Pressure Tester w/ Extras

For all M116 and M117 V8 engines from 1976 to 1985 ONLY. See related below for other years and models.

This tester is specific to K-Jetronic V8 engines due to the special fittings and adapters it includes. These included M116 and M117 engines in the W116, R107, and early W126 chassis.

On Demand Video
$15.99

Bosch K-Jetronic V8 Engine Fuel Injection Full Test Procedures

Kent demonstrates on a 380SL. Problem is found by using a quality Mercedessource pressure tester

This is the most important video you will need to watch if you are doing a fuel system pressure test on a 1976 to 1985 Mercedes V8 engine. Kent walks you through the correct testing sequence in this 26-minute video. NOTE: this is a diagnostic instructional video only.

On Demand Video
$9.99

How to Use the K-Jetronic WUR Diagnostic Test Kit - On Demand Video

Examples shown on how to use the four items included in Kent's kit

In this 14-minute video Kent will show you how to use each item in this kit to help to test your K-Jetronic fuel injection system to determine if your warm-up regulator is working properly. No full testing or repair information is included in this video.

On Demand Video
$12.99

M110 K-Jetronic Fuel Flow and Pressure Test Procedures - On Demand Video

This video will take you through the full range of tests and you hook up your pressure tester (separate video)

In this 28-minute video, Kent will walk you step-by-step through the process of fuel, flow, and fuel pressure testing and the M110 engine with Bosch K- Jetronic fuel injection. Please keep in mind.

On Demand Video
$8.99

M110 K-Jetronic Fuel Pressure Tester Hook-Up Instructions - On Demand Video

Mercedessource M110 Pressure tester and included fittings required.

In this 22 minute video Ken will walk you through the steps of hooking up his injection pressure tester to an M1 10 fuel injected engine, using the modified fittings included in his kit. No testing instructions are included here.

On Demand Video
$9.99

Fuel Pressure Testing Tips on a 380SL K-Jetronic Engine - On-Demand Video

Not every aspect of testing is included here. This will cover the basic test with tips for hook-up and depressurizing fuel.

These 8-minute video instructions are now included with Kent's basic and deluxe Version 3 fuel injection pressure tester. You will learn some tips and tricks on how to pressure test a 1976 to 1985 fuel-injected V8 engine using one of our test kits.

On Demand Video
$14.99

K-Jet Warm-Up Regulator WUR Testing and Adjustment Procedures - On Demand Video

Kent will show you some unique ways to test and adjust your WUR - his "kit" is required for all tasks . See below

In this 28-minute video, Kent will share with you some of his secrets on testing and adjusting the warm-up regulator on a 1976 to 1985 Mercedes K-Jetronic  fuel-injected engine. A fuel pressure testing and his special kit will be required to complete all tasks.

Sale
$99.99

M110 6 CYL. K-Jet WUR Relocation, Testing, and Rapid Adjusting Kit

Relocate and modify your M110 warm-up regulator so you can easily test and adjust it!

Kent has combined three of our popular M110 products into a single master kit. Each one can be purchased separately ( see below ), or you can purchase all here and save headaches and $$. You will receive detailed video instructions on how to install and use each one.

On Demand Video
$14.99

Bosch CIS Training - How to Hook Up and Test K-Jetronic Fuel Pressure

For 1976 to 1993 Mercedes with gasoline fuel injected 4, 6, and 8-cylinder engines

This video is specific to K- jetronic fuel-injected engines from 1976 to 1985. This includes the 350, 450, and 280 engines in the R107, W116, W123, and early W126 gas Mercedes. In this 29-minute video. Kent will show you how to hook up the gauge, run the fuel pumps, and complete the test.

On Demand Video
$16.99

M110 WUR Relocation Instructions - On Demand Video

Requires fabrication kit from Mercedessource and you bend and drill it to fit your engine.

These instructions are specific to installing the relocation bracket assembly that we offer for the fuel-injected M110 engine. The video runs 11 minutes and just gives an overview (not step-by-step instructions) of how you can build a relocation bracket from the parts included in our kit.

$168.00

M110 6-Cylinder Fuel Injection Pressure Tester with Instructions

For all fuel injected 280 engines from 1976 to 1985.

Why do a fuel system flow and pressure test? Without one, you will not know if your fuel injection is working properly. This is even more pronounced on K-Jetronic engines that incorporate a warm-up regulator.  And guess where that is located on the M110 engine?

$149.00

1976 to 1985 R107 Fuel Distributor Inlet Fuel Feed Hose

VERY LOW STOCK AVAILABLE -- Fits 450SL, 450SLC, and 380SL with K-Jetronic Fuel Injection

Almost NLA. As a safety preventative measure, replace this hose if it shows signs of hardening or cracking. This hose is under 90 psi; if it cracks and spews fuel, you can have an instant engine fire.

On Demand Video
$8.00

How to Adjust That Troublesome Little Screw on you 1976 to 1993 C.I.S. Fuel Injected Engine That Won't Run or Run Right

Part of Kent's $8 troubleshooting and repair video collection. The video will only cost $8 but you could save $ hundreds and much grief by watching this video.

This video applies to both K-jetronic and KE-jetronic fuel injection engines on Mercedes from 1976 to 1993.. Let's say you just acquired an old gas engined  Mercedes and you just can not get it to run right and or even get it to start.

$148.80

1976 to 1980 450 V8 Fuel Injector Holders Set of 8

Custom made from Nylon 12 by Schimmel Engineering in the U.S.A. No longer available from Mercedes!

These have been unavailable for a long time, leaving 450 engine owners with the only option to use there old ones or try to finds some good used ones on eBay. Watch the video below.

$139.00

1976 to 1980 450 V8 and 6.9 2-Hole Fuel System Accumulator

It does not fit all 450SL, 450SLC, 450SE, and 450SEL models. Some had a single-hole accumulator. You MUST remove the FID cover and inspect it before ordering.

This accumulator was unique in the mid to late 1970s. It was used on all 6.9s but only some 450 V8 models. That is why you MUST know which type you have BEFORE ordering. You can clearly see the two threaded holes coming into the front of the accumulator housing.

$196.00

1986 to 1993 V8 and 6-Cyl KE-Jetronic Fuel Injection Tester w/ Extras

Complete the full range of tests. Both long and short jumper leads supplied to power the pump(s) from the relay plug or direct from the battery.

This tester is designed specifically for 6- and 8-cylinder engines with KE-Jetronic fuel injection. (will NOT work on the 2.3-liter four-cylinder engine). Instructions will also be provided so you can do a fuel pressure test on the LH-Jetronic fuel-injected engines of the 90s.

On Demand Video
$29.99

How to Install New Fuel Injectors on a 1981 to 1991 V8 Engine - ON DEMAND VIDEO

For 380SEC, 380SL, 380SLC, 380 SE, 380SEL, 500SEL, 420SEL, 560SEL, 560SEC and 560SL from 1981 to 1985 with CIS fuel injection

This 33 minute video will instruct you on how to replace the fuel injectors in your 8-cylinder M116 engine safely and efficiently.  This is a fairly straightforward job, but there are some pitfalls you will want to avoid.

On Demand Video
$22.99

How to Install New Fuel Injectors in a 450 M117 Engine - ON DEMAND VIDEO

For 1976 to 1980 450SL 450SLC 450SE 450SEL from 1976 to 1980 with CIS fuel injection

This 25 minute video will instruct you on how to replace the fuel injectors in your 1976 to 1980 8-cylinder M117 engine safely and efficiently.  This is a fairly straightforward job, but there are some pitfalls you will want to avoid.

$249.99

All-In-One 1970 to 1997 Bosch Fuel Injection Pressure Tester w/ Lots of Extras

Covers D-Jetronic, K-Jetronic, KE-Jetronic, LH-Jetronic fuel injection testing and diagnosis. (4-cylinder 2.3 liter not included)

New in April of 2026. This is the "whole ball of wax," including 10 free on-demand training videos.  Kent put this kit together for those enthusiasts who own multiple classic Mercedes from the 1970s through the 1990s. Fuel Injection back then was not as reliable as it is now.

$30.29

1976 to 1993 C.I.S Fuel Injection 6-Part Video Training Seminar

6 videos total covers both K-jetronic and KE-jectronic fuel injection system theory and testing. Over 2.5 hours of detailed video instruction

It has been over 30 years since the last Mercedes with Bosch C.I.S. fuel injection was manufactured. If you own a 1976 to 1993 Mercedes gas engine with this type of fuel injection, you may have difficulty finding someone to work on your car. In some parts of the country, it may be impossible.

On Demand Video
$16.99

How to Test the EHA Valve on Bosch KE-Jetronic Fuel Injected Engines - On Demand Video

Factory training manual procedure followed step-by-step. You will be surprised by what Kent found on this 560SL engine.

In this 13-minute CIS training video, Kent will walk you through the steps recommended by Mercedes Benz to fully test the operation of the EHA valve on 1984 to 1993 4, 6, and 8-cylinder engines with KE-jetronic fuel injection.

On Demand Video
$8.99

1972 to 1980 4.5 450 Engine Fan Clutch Replacement Instructions - On Demand Video

For both D-Jetronic and K-Jetronic V8 engines. This will help you get your new fan clutch installed properly with new upgraded hardware.

In this 12 minute instructional video, Kent will demonstrate how to remove and replace the viscous fan clutch in a 1972 300SEL 4.5. Other topics covered will be cleaning and corrosion prevention. This video is included free with the purchase of our fan clutch install kit ( see below).

$18.00

1972 to 1980 4.5 450 Engine Idle Air Valve Installation Kit

For both D-Jetronic and K-Jetronic. Comes with new stainless bolts, supplies, and video instructions - free cold start injector gasket included.

This is one part that is very subject to corrosion and leaks around the base. When the actual part fails, included our new stainless bolts that won't corrode with instructions on how to carefully get the old corroded bolts out.

$49.50

1972 to 1980 4.5 450 Engine Thermostat Replacement Kit

For both D-Jetronic and K-Jetronic.Comes with stainless steel replacement bolts and video instructions

This is seldom replaced. If you engine is taking over 15 minutes to get up to full operating temp then your thermostat is probably worn now. We got you covered with kit. We will get you the extra hardware, supplies and video instructions so you have the confidence to do this job yourself.

On Demand Video
$9.99

1970 to 1993 Fuel Injection Pressure Tester Hook-up - Quick Overview

On Demand Video showing how to hook up the tester to - D-Jet, K-Jet, and KE-Jet engines. No Testing Information Included

In the 14-minute video, Kent will show and explain his new version 3 fuel system pressure tester released in January 2025, and will demonstrate briefly how it is hooked up to the D-Jetronic, K-Jetronic, and KE-Jetronic fuel injection systems.

On Demand Video
$6.99

1972 to 1980 4.5 450 Engine Thermostat Replacement - On Demand Video

For both D-Jetronic and K-Jetronic engines. You can do this job yourself with these instructions and the special hardware included.

In this 14 minute instructional video Kent will demonstrate how to remove and install a new thermostat in a 450 engine. Here you will see how tight it is to get install in a 300SEL 4.5, but other V8s will have better access.

$129.50

1972 to 1980 4.5 450 Engine Fan Clutch Replacement Kit

For both D-Jetronic and K-Jetronic. Comes with new hardware, anti-corrosive gel, and video instructions

Most of the older 450 engine fan clutches are still original on most of the older unrestored V8 models from 1970 to 1980. If you are having problems with your 450 V8 running hot check the friction in your clutch. They are often worn out as they seem to never get changed.

On Demand Video
$4.99

How to Test Your Fuel Accumulator - ON DEMAND VIDEO

Has your rear-mounted fuel accumulator failed on your 1976 to 1993 K-Jetronic or KE-Jetronic fuel system

In this 9 minute instructional video, Kent will explain how to test your fuel accumulator to determine whether or not it has failed internally. A failed accumulator will make your engine hard to start when hot.

$55.00

Digital Multimeter for Testing Fuel Injection and Other Electrical Components

Auto seeking and auto adjusting. The best meter under $60 anywhere. Kent's favorite. Large easy-to-read screen. Very accurate and fast Ohm readings. Kent's training video for general electrical testing is included.

You do not need a $100 plus multimeter to test most automotive electrical components. But you do need one that is very accurate and easy to read. This is especially true when testing D-jetronic and K-Jetronic fuel injection.

On Demand Video
$12.99

How to Replace the Older V8 Distributor Cap and Rotor - On Demand Video

Don't make the common mistake! Applies to all M116 and M117 V8 engines from 1970 to 1991

Replacing a distributor cap is easy right. No problem?? If it were I would not get so many emails and why the engine won't run right after changing the cap and rotor. This is a short eight and a half minute video but the tips I share could save you some big headaches.

$14.75

3 Foot Long Multipurpose 12v Test Leads w/ Removable Clips

Ready to use. Alligator clips can be removed to attach other fittings or to test female plugs.

The leads are black and red and three feet in length. The alligator clips can be removed to give you other options on how you use them.

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