Knocking suspension when cold

[Surrey Sam]

At a guess, I'd imagine that it's the fluid rushing within the chamber due to air gaps and hitting the end of the chamber/base valves which causes a knock.

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Well got riv back, pressure on DRC was very slightly down from 20- 19.5
So they re pressurised the system, and think the squeak was coming from the location lugs for the back seat, they are waiting for some new updated ones to come in, all in all pleased with Guildford Audis service. I think that most cars with DRC will suffer from a slight knock on comfort mode, it's just one of things, it's hardly noticeable TBH

Specs say that by plugging in the pressure gauge you will lose 0.5 bar anyway

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At a guess, I'd imagine that it's the fluid rushing within the chamber due to air gaps and hitting the end of the chamber/base valves which causes a knock.

The whole recharging process is quite convoluted in order to prevent air in the system.

[Surrey Sam]

At a guess, I'd imagine that it's the fluid rushing within the chamber due to air gaps and hitting the end of the chamber/base valves which causes a knock.

The whole recharging process is quite convoluted in order to prevent air in the system.

Hasn't stopped Audi tech's getting it wrong historically and enough to warrant a re-design of the special tool.

[RIV]

Hasn't stopped Audi tech's getting it wrong historically and enough to warrant a re-design of the special tool.

Exactly!! Sam has a point ads
Think you need to stand down,Sam is the man in the know

[Ricky]

At a guess, I'd imagine that it's the fluid rushing within the chamber due to air gaps and hitting the end of the chamber/base valves which causes a knock.

Would this not make the suspension act in an unsafe manner or handle any differently to a car with no knock ? I know you can hear the knock at slow speeds but would this action inside the chamber affect the car on a spirited drive at higher speeds ?