[Leveret]

I had overnight sagging at the front too. Leave the car in jack mode to see which strut leaks, otherwise it keeps waking up and trying to level itself using lots of air from the accumulator. This stresses the compressor which then has to refill the accumulator. Using the soapy water test, there was foam from the top of the driver's side turret. Probably a failed top 'O' ring, which I think is probably the weak point of the system. After allowing it to settle I injected industrial strength sealant into the top of the strut where I'd seen the bubbles appear. It's partially cured it as it now takes 48hrs to settle, and I can live with that. As long as I remember to leave it in jack mode it levels itself just from the accumulator when switching the ignition on; the compressor doesn't even need to start up immediately. Hope this saves someone a huge bill!