There is no dipstick installed. There is a dipstick available to service centers and dealerships. Unfortunately you need to drive to one of these to check the level or you can order the dipstick from your local dealer.
Zee
RepairPal Certified shops can diagnose and repair your 2007 Mercedes-Benz CLK550. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.