PMD Products Mercedes Benz 722.6 Automatic Transmission Fluid Dipstick 1220mm 140589152100 PLEASE NOTE: This tool MUST be removed from the dipstick tube after use. It is NEVER meant to be left in. The tool is designed to measure the fluid level of transmission while engine is running and gear in PARK. The gauge markings --&gt;&gt; 1-3 for the ambient 25C range (77F) is correct level The gauge markings --&gt;&gt; 10-12 for the hot range 80C (176F) is correct level. Full length:1220mm (48")