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103 Engine 6 Cylinder Power Tuning Guide By Kent Bergsma - Download

Repair Guide for the Following Models: 190E 2.6, 260E, 300E, 300CE, 300TD, 300SEL 1986 - 1992

Fits the following, 201, 124, and 126 chassis with 6 cylinder single cam gas engine. In my opinion, the 103 6 cylinder gas engine (built from 1986 to 1993) is one of the best engines Mercedes has ever built.

On Demand Video
$4.99

Waking Up An Old Benz That Has Sat For Years Part 1 - On Demand Video

Kent covers what you may have to do first with the engine and fuel system

When an old Mercedes ( or any other car for that matter ) has sat idle for over a year it can be a challenge to get it safely back on the road again. If it has sat idle for more than 5 years you may find it difficult to even get the engine running. 

$99.75

201 and 124 Chassis 103 Engine Ignition Spark Plug Wire Set

You can experience a number of engine performance problems with old wires - especially the coil wire.

FITS THE FOLLOWING:  1985 to 1993 W124, W126, and W201 chassis with a 6 cylinder 103 engine. Is your M103 six cylinder engine not running as smoothly as it use to. These wires should be changed at 70,0000 to 80,000 miles for smooth running and peak performance.

$26.50

102 103 104 and V8 Gas Engine Fuel Pump Check Valve

Fits most gas models from mid to late 1980s up through mid 1990s (exceptions noted)

Each fuel pump has a critical check valve mounted at the pump outlet. The purpose of this check valve is to prevent fuel from leaking back through the pump after the engine has been shut down. Constant fuel pressure must be held in the fuel system for the engine to restart quickly.

$22.50

M103 Engine Spark Plugs x 6

Since Bosch plugs for these engines are no longer available Kent recommends these NGK plugs

Fits 124 201 126 Chassis with M103 engine only, including 190E 260E 300E 300TE 300CE 300SE and 300SEL . These are the current plugs Kent recommends for this 6 cylinder gas engine.

$159.50
Currently out of stock.

190E 2.6 260E 300E 300SE Distributor Overhaul Kit w/ Special Tool

For all M103 6 cylinder Single Cam Engines from 1985 to 1993

Distributor neglect is one of the most common neglected maintenance items that we see on the 6 cylinder 103 engine. Just because the engine is running ok does not mean that the parts are not worn out. One day you will get up in the morning and the engine will not start.

On Demand Video
$12.99

CIS Gas Fuel Injector Removal, Cleaning and Testing - On Demand Video Manual

How to know for sure how well your gas fuel injectors are performing (1976 to 1993 CIS ONLY)

If you think CIS fuel injectors can just be ignored, think again. Sure, your gas engine will continue to start and run “ok”, but you may find that it is not producing the power it once did nor the fuel mileage it once delivered.

$249.00

CIS Gas Fuel Injector Spray Pattern Tester and Nozzle Cleaner

NEW VERSION 3 release.. See application notes below:

Works on all models from 1977 to 1993 with the Bosch C.I.S Fuel Injection system - see models listed below: Now you can do it yourself on the bench with this inexpensive tester- Save big $$.  Ever wonder how well your old CIS fuel injectors are working?

$198.50

104 Engine Run Insurance Tune Up Kit with Special Tools

This tune up kit fits the 6 cylinder twin cam engine in the 1990 to 1993 300SL, the 1990 to 1992 300CE coupe, and the 1992 to 1993 300SE 140 Sedan. Why this tune up kit and why do I call it run insurance? Let me explain: