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Test alternator fuse - AR15.40-P-5012EW

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ENGINES 272, 273, 642, 651 in MODEL 212 

Connection diagram 

Fig 1: Testing Alternator Fuse
G09975093Courtesy of MERCEDES-BENZ USA
REMOVINGINSTALLING Remove/install     
DANGER Risk of explosion  caused by escaping oxyhydrogen gas. Risk of injury  caused by caustic burns to eyes, skin and mucous membranes from battery electrolyte (contains diluted sulfuric acid) or metal spatter due to short circuit. Risk of burn injuries  caused by short circuit. Risk of poisoning  caused by swallowing battery electrolyte (contains diluted sulfuric acid) or absorption of lead over the skin or orifices No fire, sparks, open flames or smoking. Wear acid-resistant gloves and clothing and safety glasses with side guards.
Do not place any conductive objects on the battery and avoid any short circuit from battery positive to ground.
Only fill liquid battery electrolyte (diluted sulfuric acid) into suitable and appropriately marked containers.		 AS54.10-Z-0001-01A
1 Detach ground line on on-board electrical system battery (G1) NOTES To protect against unwanted contact of the ground line which has been detached with the ground point of the on-board electrical system battery, insulate clamping device of ground line. AR54.10-P-0003EW
NOTES Notes on battery AH54.10-P-0001-01A
2.1 Remove lower engine compartment paneling Vehicles with gasoline engine AR61.20-P-1105EW
2.2 Remove bottom section of soundproofing Vehicles with diesel engine AR94.30-P-5300EW
3 Remove nut for connection terminal 30 on starter (M1) TORQUE SPECIFICATION Engine 272/273 *BA15.30-P-1001-01J 
TORQUE SPECIFICATION Engine 642 *BA15.30-P-1001-01N 
TORQUE SPECIFICATION Engine 651 *BA15.30-P-1002-01P 
4 Unscrew nut for connection B+ on alternator (G2) TORQUE SPECIFICATION Engine 272/273 *BA15.40-P-1002-01F 
TORQUE SPECIFICATION Engine 642 *BA15.40-P-1002-01D 
TORQUE SPECIFICATION Engine 651 *BA15.40-P-1001-01Q 
INSPECT Check     
5 Connect multimeter (003) according to connection schematic    
6 Check starter and alternator fuse (in wiring harness) (F56) IMPORTANT The starter and generator fuse (in wiring harness) (F56) is integrated in the wiring harness.
IMPORTANT If resistance >1Ω, then the wiring harness is defective and must be replaced.		  
7 Install in the reverse order    
STARTER

Number Designation ENGINE 272, 273
BA15.30-P-1001-01J Nut, connection for circuit 30 Nm 15
STARTER

Number Designation ENGINE 651
BA15.30-P-1002-01P Nut, connection for circuit 30 Nm 14
STARTER

Number Designation ENGINE 642
BA15.30-P-1001-01N Nut, connection for circuit 30 Nm 14
ALTERNATOR

Number Designation ENGINE 272 ENGINE 273
BA15.40-P-1002-01F Nut of circuit B+ to alternator Nm 15 15
ALTERNATOR

Number Designation ENGINE 642
BA15.40-P-1002-01D Nut of circuit B+ to alternator Nm 15
ALTERNATOR

Number Designation ENGINE 651
BA15.40-P-1001-01Q Nut of circuit B+ to alternator Nm 18
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