This 16 page PDF downloadable SLS manual was written specifically for 123 300TD wagon owners, but also applies to the models mentioned above, 300TDs from 1979-1985 and other chassis above up to 1990.
Product Details
If you own or are planning to purchase one of these popular wagons, I guarantee at some point you will have to deal with the SLS (Self Leveling Suspension) system. PLEASE NOTE: If you have a 1987 to 1995 124 chassis wagon this manual will only cover basic principles of troubleshooting. It does not cover the pump or the rear sway bar which are different on 124 wagons.
These systems are all 25 plus years old and any number of key components can fail leaving you with a rough ride, sagging rear end and poor handling. The first step to repairing a faulty SLS is to understand how it works. Proper troubleshooting requires a thorough knowledge of each component and how they all work together.
This 26 page guide will help remove the "mystery" by walking you through the theory of operation, common problem areas, troubleshooting steps to isolate the cause quickly, and routine maintenance and adjustment. Following the guidelines laid out in this manual can save you from spending big $$ by not throwing parts at the problem.
PLEASE NOTE: This is a troubleshooting and service guide. It is not a full repair manual. Due to variations in different models using SLS, detailed component replacement instructions will NOT be included. Removal and replacement of many of the parts are self explanatory to the average DIY mechanic. The most difficult component to remove and install is the rear hydraulic actuator (strut). Getting to it by removing numerous interior panels is often more time consuming than installing the part itself. Please refer to the factory manual specific to your vehicle if you need instructions for replacing individual components.
How to view this on-demand Manual:
Once you complete the purchase of this manual you will be able to download it immediately when you are logged in and on your personal account page (click on My Account). The PDFs will show up under My PDF Manuals. You will be allowed three downloads, so please save the file on your machine for backup.
Important note: This PDF may or may not contain all the information you will need to solve your specific problem. Please read the description carefully and make certain it applies to your particular Mercedes. If you are not certain please contact us first. Due to the nature PDF download manuals or instructions we can not issue a refund if you purchase in error or assume it contains information it does not. Please keep in mind that no follow-up technical support is implied or offered after purchase.
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Self Leveling Suspension (SLS) High Pressure Hose Replacement Kit w/ Instructions
If you own a 123 wagon or other Mercedes with self-leveling suspension, you will be faced someday with having to replace the main high-pressure hydraulic hose that goes from the engine-driven pump to a metal line fitting routed back to the rear suspension.
SLS (Self Leveling Suspension) Fluid Service Kit with Instructions
Dont neglect this service as many do! I recommend the hydraulic fluid and filter be changed every 30,000 miles. You would not believe how many SLS vehicles I have seen with dirty hydraulic fluid - I mean nasty! Sometimes I have even found engine oil in the system!