Checking for leaks in cooling systems and heating circuits. Cooler adapter (with bayonet lock) for passenger cars: MINI from 2001 and MERCEDES-BENZ SLK, CLK, Sprinter from 1999 and types 170, 208, 611 as well as W124 from 1984 to 1993. For commercial vehicles and agricultural machinery: DEUTZ engines KHD1015, D2008, D2009, TD2.9 L4, TCD3.6, BFM1013, BFM2012, TCD2013 2V, BFM1015, TCD2015 V8, V6, M, TCD 12.0 and 16.0. Expansion of the existing cooling system testers HAZET 4800. Precisely matched threads to the expansion tank opening. Coupling nipple for connection to the quick coupling of the cooler pump 4800-1 and intermediate piece 4800-2 or vacuum filling device HAZET 4801-1 and 4802-1.