Brian Eslick from How to Automotive http://www.howtoautomotive.com takes you step-by-step through the process of resealing the brake booster vacuum pump on a Volvo XC60 with 2.5L turbo engine.
How to Replace the Vacuum Pump, Cam Plugs, and PCV Valve on a 2007-2014 Mercedes C300 (Common Leaks)
How to Replace/Reseal the Vacuum Pump on a 2010 Mercedes C300
Brian Eslick from How to Automotive takes you step-by-step through the process of replacing /resealing the vacuum pump on a 2010 Mecedes C300.