165
MAINTENANCE INSTRUCTIONS 
G725 E726 G716 
REPLACEMENT OF COOLING FLUID 
Follow this procedure: 
1. Open the heating circuit cock  (A) and 
release the overpressure lid on the 
expansion tank (B) 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
2. Drain cooling fluid from the tank (C). 
The drain screw is accessible after 
removal of the left part of the bonnet. 
3. Drain cooling fluid from the block of 
the engine (D). The drain cock is ac-
cessible after removal of the right part 
of the bonnet. 
4. After drainage of cooling fluid close 
the screw and cock (let the heating 
circuit cock open). 
 
 
 
 
 
 
 
 
5. Fill the cooling system with an anti-
freezing mixture. 
6. Start the engine and let it running for 
approx. 1 minute. 
7. Refill anti-freezing mixture in the ex-
pansion tank up to the upper gauge 
mark MAX. 
8. Close the expansion tank by the 
overpressure lid. 
Replace anti-freezing mixture after two 
years at the latest.