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Home >> Mercedes Benz >> 2021 >> E53 AMG 2D Convertible >> Repair and Diagnosis >> Body & Frame >> Sun Roof/T-Top/Convertible Top >> Sliding Roof, Soft Top, Top Attachments - 238 Chassis >> Testing & Repair >> Remove/Install Soft Top Hydraulic Pump - AR77.37-P-1000LWP

Remove/Install Soft Top Hydraulic Pump - AR77.37-P-1000LWP

Model 238.4 

G15378946Courtesy of MERCEDES-BENZ USA
Fig 1: Soft Top Hydraulic Pump Components Location - Model 238.4
G15378947Courtesy of MERCEDES-BENZ USA
WARNING Risk of injury  to skin or eyes from hydraulic fluid spraying out under pressure.Risk of poisoning  from swallowing hydraulic fluid. Depressurize hydraulic system completely before starting any work on it. Wear protective clothing and safety glasses. AS00.00-Z-0013-01A
REMOVING Remove     
1 Switch off ignition and store transmitter key outside of transmission range (min. 2 m) IMPORTANT After a waiting time of min. 20s the hydraulic is depressurized.  
2 Remove left luggage compartment lining   AR68.30-P-4800LWR
3 Remove paneling from spare wheel well    
4 Separate electrical connections (1)    
5 Unscrew bolt (2) and remove with mounting rail TORQUE SPECIFICATION Bolt, mounting rail for hydraulic unit to vibration damper *BA77.37-P-1001-01E 
6 Remove soundproofing (3) from soft-top control hydraulic unit (A7/5) SPECIAL TOOL Mounting wedge Fig 2
7 Expose electrical line of soft-top control hydraulic unit (A7/5)    
8 Disconnect hydraulic lines from soft-top control hydraulic unit (A7/5)   AR77.37-P-1000-04LWR 
    TORQUE SPECIFICATION Bolt, connection plate to hydraulic unit *BA77.37-P-1002-01E 
    SPECIAL TOOL Record plug Fig 3
9 Remove soft-top control hydraulic unit (A7/5) from vehicle IMPORTANT The hydraulic pump is integrated into the soft to control hydraulic unit (A7/5) and cannot be replaced separately.  
INSTALLING Install     
10 Position soft-top control hydraulic unit (A7/5) horizontally in installation position    
11 Connect hydraulic lines on soft-top control hydraulic unit (A7/5)   AR77.37-P-1000-04LWR 
    TORQUE SPECIFICATION Bolt, connection plate to hydraulic unit *BA77.37-P-1002-01E 
    SPECIAL TOOL Record plug Fig 3
12 Connect electrical connections (1)    
13 Add hydraulic oil up slightly below "MAX" marking If required.  
REFER TO CAPACITIES & SPECIFICATIONS Hydraulic fluids (Specification 343.0) IMPORTANT Use suitable funnel or bottle. BB00.40-P-0343-00A
    TORQUE SPECIFICATION Oil filler screw to hydraulic unit reservoir *BA77.37-P-1003-01E 
14 Open soft-top with switch and close IMPORTANT The hydraulic system can be bled by opening and closing.  
15 Check oil level in soft-top control hydraulic unit (A7/5), correct   AR77.37-P-3501LCA 
16 Install soundproofing (3)    
17 Route electrical line of soft-top control hydraulic unit (A7/5)    
18 Install mounting rail with bolt (2) and tighten bolt (2) TORQUE SPECIFICATION Bolt, mounting rail for hydraulic unit to vibration damper *BA77.37-P-1001-01E 
19 Insert paneling of spare wheel well    
20 Install left trunk paneling   AR68.30-P-4800LWR
SOFT TOP HYDRAULIC SYSTEM

Number Designation Model 238
BA77.37-P-1001-01E Bolt, mounting rail for hydraulic unit to vibration damper Nm 23
SOFT TOP HYDRAULIC SYSTEM

Number Designation Model 238
BA77.37-P-1002-01E Bolt, connection plate to hydraulic unit Nm 4
SOFT TOP HYDRAULIC SYSTEM

Number Designation Model 238
BA77.37-P-1003-01E Oil filler screw to hydraulic unit reservoir Nm 1
Fig 2: Identifying Mounting Wedge (110 589 03 59 00)
G15378948Courtesy of MERCEDES-BENZ USA
Fig 3: Identifying Record Plug (129 589 00 91 00)
G15378949Courtesy of MERCEDES-BENZ USA