E-Class (W212) 2010 - 2016: E 350, E 550

Airmatic Diagnostics

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Old 04-18-2021, 07:32 PM
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2010 E550
Airmatic Diagnostics

Car in question is a 2010 E550. I wanted to confirm that the leak was the strut and not in the lines or the solenoid block. The photo shows the adapter used to isolate the strut, it would work equally well with the rear springs. I couldn't find a 4mm tube to female connection so went with the female to female coupling and an additional male. Looking at the pictures you can see the valve was inserted immediately before the questionable strut, with the valve open I let the car level itself and then closed the valve overnight. The car still dropped as it had before so I concluded the strut was bad. I did not drive, and would not recommend driving, the car with the adapter installed.




Peter

Parts used...

4mm tube -
Amazon.com: Utah Pneumatic 4mm Od Or 5/32"10 Meters 32.8 Feet PU Air Tubing Pipe Hose pu Air Hose for Air Line Tubing Or Fluid Transfer Pneumatic tubing (pu Tube 5/32): Home Improvement Amazon.com: Utah Pneumatic 4mm Od Or 5/32"10 Meters 32.8 Feet PU Air Tubing Pipe Hose pu Air Hose for Air Line Tubing Or Fluid Transfer Pneumatic tubing (pu Tube 5/32): Home Improvement
Male connector -
Amazon.com: AIRSUSFAT Air Suspension Spring Strut Valve Air Suspension Valve for Audi Q7 VW Touareg Cayenne 955 Jeep Air Compressor Fittings M10 for Mercedes W164 W251 W166 W212 W221 W220 W211 7L0616813: Automotive Amazon.com: AIRSUSFAT Air Suspension Spring Strut Valve Air Suspension Valve for Audi Q7 VW Touareg Cayenne 955 Jeep Air Compressor Fittings M10 for Mercedes W164 W251 W166 W212 W221 W220 W211 7L0616813: Automotive
Valve -
Amazon.com: Beduan Push to Connect Fitting Ball Valve, 4mm Tube OD Pneumatic Air Flow Control Ball Valve Straight Union Connect Adapter: Home Improvement Amazon.com: Beduan Push to Connect Fitting Ball Valve, 4mm Tube OD Pneumatic Air Flow Control Ball Valve Straight Union Connect Adapter: Home Improvement
Female to female coupling - Lube Line Female Thread Coupling M8x1 106201 - Lube USA - Shop Now (cnc-specialty-store.com


Last edited by T100T; 04-18-2021 at 07:47 PM.
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bmwpowere36m3 (04-18-2021), pierrejoliat (04-19-2021)
Old 04-18-2021, 08:37 PM
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2010 E550, 273 Engine: 2012 S550, 278 Engine
Originally Posted by T100T
Car in question is a 2010 E550. I wanted to confirm that the leak was the strut and not in the lines or the solenoid block. The photo shows the adapter used to isolate the strut, it would work equally well with the rear springs. I couldn't find a 4mm tube to female connection so went with the female to female coupling and an additional male. Looking at the pictures you can see the valve was inserted immediately before the questionable strut, with the valve open I let the car level itself and then closed the valve overnight. The car still dropped as it had before so I concluded the strut was bad. I did not drive, and would not recommend driving, the car with the adapter installed.




Peter

Parts used...

4mm tube - Amazon.com: Utah Pneumatic 4mm Od Or 5/32"10 Meters 32.8 Feet PU Air Tubing Pipe Hose pu Air Hose for Air Line Tubing Or Fluid Transfer Pneumatic tubing (pu Tube 5/32): Home Improvement
Male connector - Amazon.com: AIRSUSFAT Air Suspension Spring Strut Valve Air Suspension Valve for Audi Q7 VW Touareg Cayenne 955 Jeep Air Compressor Fittings M10 for Mercedes W164 W251 W166 W212 W221 W220 W211 7L0616813: Automotive
Valve - Amazon.com: Beduan Push to Connect Fitting Ball Valve, 4mm Tube OD Pneumatic Air Flow Control Ball Valve Straight Union Connect Adapter: Home Improvement
Female to female coupling - Lube Line Female Thread Coupling M8x1 106201 - Lube USA - Shop Now (cnc-specialty-store.com
Nice work!


Old 04-18-2021, 10:09 PM
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'11 E350, '11 E550, '98 M3, '95 E320
Great stuff OP... nice to be able to definitively diagnose a repair.
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