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Butt of car Sinks down in garage after about 3 days. Ride light is on and suspenaion defaulted to sport mode. These seemed to happen at same time, hence I mention them together. We replaced front accumulators, struts, and many front rubber parts to stop clunking noise over bumps. Car drove perfect for a few weeks then slowly started to have the fix ride light come on more and more till on all the time. Suspension acts fine front and rear but stuck in sport mode. No leaks, 29k mike Car, don’t have previous records. Clues? Guesses?
 

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you replace front suspension / struts?
Check all electrical connexion to struts , put electrical spray

Otherwise you need to test and maybe resset with this

ttps://www.flyingspares.com/shop/rolls-royce-bentley-garage-workshop-tools/rolls-royce-bentley-tools-test-boxes/suspension-tools/auto-ride-diagnostic-tool-ud73741p.html
 

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You need to interrogate the Auto Ride ECU using a proprietary scan tool or RR Mastercheck. The most common faults with the system though are corroded connections at the dampers. Remove tape from the plugs, clean pins and sockets with Caig Deoxit or similar, and retape with new electrical tape. If that doesn't correct the Auto Ride then you need the scan tool. Did you replace the gas springs in the rear? If not that is likely part of your issue.
 

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My Turbo R was reverting to sports mode even with new spheres and there's a factory replacement chip that fixed it. Not expensive. Kept pinging the auto ride light
 
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