in the port quarter. 2000 4matic wagon, 179K on the clock and when she sits idle for more than 2 days, a left rear sag about 2"-2.5" happens.
The hydrolic resevoir is full, right side is OK and ride is good.
Is this a checkvalve or seal that allows the fluid or pressure to vent to atmosphere?
What are the most common causes of this issue? Thanks

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Free your heel and your mind will follow!

I have searched for tips here, can ANYONE help with this?
What to type in the search box?
What to check for under the car?
Anything?

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Free your heel and your mind will follow!

Are you sure you don't have air springs on this unit? Sounds like you have an air spring leaking down.

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Jim

Its a hydraulic rear suspension with a level control valve actuated off of the rear sway bar. Id expect the valve failing in the absence of an external leak. Logicly any other failures in the system would cause both sides to sag.

If it were me I wouldnt worry about it as long as it pumps right up when running.

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90 300TE 4-M
Turbo 103, T3/T04E 50 trim
T04B cover .60 AR
Stage 3 turbine .63 AR
A2W I/C, 40 LB/HR
MS2E, 60-2 Direct Coil Control
3" Exh, AEM W/B O2
Underdrive Alt. and P/S Pulleys,
Vented Rear Discs, .034 Booster.
3.07 diffs 1st Gear Start

90 300CE 104.980
Milled & ported head, 10.3:1 compression
197° intake cam w/20° advancer
Tuned CIS ECU
4° ignition advance
PCS TCM2000, built 722.6
600W networked suction fan
Sportline sway bars
V8 rear subframe, Quaife ATB 3.06 diff

Thanks Duxthe 1

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Free your heel and your mind will follow!