If you have a VERY slow leak in your Airmatic Mercedes, trying to find it can be very frustrating. It could be in the valve block, one of the lines, or the Airmatic strut itself. Small leaks in the strut can be the hardest to find if you cannot hear it. Kent found the best way to test is to pressurize the strut with a valve and gauge and see if the pressure drops. Watch the video below to see how it works.
Product Details
In early 2025, we introduced version 2. We are now only selling the fully assembled and tested unit here in our shop. We install the airmatic fitting on the end of the hard line for you and include a spare (as you can see in the picture). This fitting must go into the strut's top for pressure testing. The fitting is 8mm in diameter. You may be able to adapt this tester to a larger fitting, but you would be on your own. Comes with limited video instructions. You will need a compressor that can produce a minimum of 90 PSI.
NOTE: There is one thing we do not include that you will have to supply. We DO NOT supply the female 1/4 NPT air fitting. There are differences, so you need to provide the one that will match up to your compressor.
Related Products:
W220 W221 Airmatic Special Tool: Rear Strut Top Fitting Removal
On 2000 to 2013 S Class sedans with airmatic suspension, getting to the top fitting on the rear strut under the panel below the rear glass can be a real pain. It is so tight in there you can hardly see what you are doing.
Airmatic Fitting and Plastic Line Repair Kit
This kit includes 4 end fittings that attach the lines to the struts and the valve block, 1 meter of 4mm high-pressure line, and 2 splice connectors if you have to replace a broken or cracked plastic high-pressure line. These are "push-on to lock" in place. Very easy to install.