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Home >> Mercedes Benz >> 2019 >> E450 4Matic, 2D Convertible >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Electrical System - Engine - 238 Chassis >> Testing & Repair >> Remove/Install Belt Driven Alternator - AR15.40-P-5032MND
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Remove/Install Belt Driven Alternator - AR15.40-P-5032MND

Engine 276.8 In Model 213, 238 

Fig 1: Belt Driven Alternator Components Location - Engine 276.8 In Model 238
G15375123Courtesy of MERCEDES-BENZ USA
WARNING Risk of injury  . Skin or eye injuries may result when handling hot or glowing objects. Wear protective gloves, protective clothing and safety glasses, if necessary. AS00.00-Z-0002-01A
CAUTION Risk of injury  caused by scraping or cutting body parts on sharp vehicle parts Always wear protective gloves when working on or near sharp and non-deburred vehicle parts.
Deburr repair panels.
AS00.00-Z-0017-01A
Notice  Notes on self-locking nuts and bolts   AH00.00-P-0001-01KOA
Notice  Information on preventing damage to electronic components due to electrostatic discharge   AH54.00-P-0001-01A
REMOVINGINSTALLING Remove/install     
1 Disconnect ground line at battery Engine 276.8 in model 213 AR54.10-P-0003LW
    Engine 276.8 in model 238 AR54.10-P-0003LWO
2 Remove lower center and center engine compartment paneling   AR61.20-P-1105LWE
3 Remove boost pressure control pressure transducer and place with attached lines to one side   AR07.17-P-7004MND
4 Remove fan unit   AR20.40-P-5050MND
5 Attach guard plate to radiator    
REFER TO SHOP-MADE TOOLS     WF58.50-P-0110-01A
6 Remove right charge air pipe   AR09.41-P-1326MND
7 Remove poly-V belt from alternator (5)   AR13.22-P-1202MND
8 Remove wiring harness on generator (5)   AR15.40-P-5032-01MND 
    TORQUE SPECIFICATION Nut, circuit B+ to alternator *BA15.40-P-1002-01F 
9 Remove screw/bolts (3) and lay alternator (5) on the front axle carrier remove holder (4) and screw/bolts (3) TORQUE SPECIFICATION Bolt, alternator to timing case *BA15.40-P-1001-01F 
10 Take alternator (5) upwards and out    
11 Install in the reverse order    
WARNING Risk of accident  from vehicle starting off by itself when engine running. Risk of injury  (bruises and burns) resulting from working on the engine while it is being started or when it is running. Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts. AS00.00-Z-0005-01A
12 Perform an engine test run while checking for proper operation of alternator (5)    
ALTERNATOR

Number Designation Engine 276
BA15.40-P-1001-01F Bolt, alternator to timing case Stage 1 Nm 20
Stage 2 Nm -
ALTERNATOR

Number Designation Engine 276
BA15.40-P-1002-01F Nut, circuit B+ to alternator Nm 15