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Ado
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I am in the UK and have a Cayenne Turbo (2007 mfg). I had just started my holiday to the French Alps when on the highway at about 70mph I received a "PSM Failure" warning on the dashboard. At the same time the steering shuddered and it felt as if something "released". I still had steering control but there is more vibration at speed. I pulled over at the next opportunity and switched the car off and read the manual (it recommend visiting a specialist Porsche workshop and to drive carefully). I restarted the car - the same warning light came on and then immediately went off but the steering at rest/low speed is very heavy. I continued on my trip without any problems although driving through hairpins on a snow/ice covered road at an appropriately slow speed the car did slide twice and I recovered but the PSM active light never showed. In addition, prior to the PSM Failure incident the PDCC was audible (clicking in and out) when going up and down car park ramps - but not any more - and generally the car is not as flat on cornering as it was before. I have now returned to home and I am going to take my car to get checked out. As the dashboard fault has now disappeared - besides re-telling my story above - what should I specifically be asking them to check? Any technical advice most welcome. Thanks, Adrian