It would be SO easy to own the service DVD for your car and follow the procedures therein. No chance, then, of 17 different answers mostly from people who have never seen a car like yours.

http://www.startekinfo.com/StarTek/outside/9124/?requestedDocId=9124

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Kent Christensen
Albuquerque
'07 GL320CDI, '10 CL550. '01 Porsche Boxster
Two BMW motorcycles