Remove/Install Soft Top Control Hydraulic Unit - AR77.37-P-3500RGR

Model 190.4 

Fig 1: Soft Top Control Hydraulic Unit Components Location - Model 190.4

Courtesy of MERCEDES-BENZ USA

Courtesy of MERCEDES-BENZ USA

	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
Topical note	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
	Remove
1	Remove SAM control unit with fuse and relay module in rear and place to one side with connected electric lines		AR54.21-P-1271RGR
2	Remove AIRSCARF control unit and place to one side with connected electric lines	Model 190.4 with code 403 (Airscarf system)	AR91.30-P-2006RGR
3	Remove HERMES control unit and place to side with connected electric lines	Model 190.4 with code 360 (HERMES UMTS) Model 190.4 with code 362 (HERMES LTE)	AR82.95-P-0019RGR
4	Open clamping band (1) and remove tape (8)
5	Remove hydraulic unit container (2) from soft top crossmember (9)
6	Remove soft top control hydraulic unit (A7/5) from hydraulic unit container (2)	Handle soft top control hydraulic unit (A7/5) with care. Otherwise, hydraulic lines (5) can be damaged.
7	Unscrew screws (3) and remove retaining plate (4)	Protect vehicle interior against leaking hydraulic fluid. Otherwise, the vehicle interior can be contaminated by leaking hydraulic fluid.
8	Pull hydraulic lines (5) out of soft top control hydraulic unit (A7/5) and close immediately after removal	Hydraulic lines (5) and connections to soft top control hydraulic unit (A7/5) must be closed immediately after removal. Otherwise, the vehicle interior can be soiled with hydraulic fluid that runs out.
		Record plug	Fig 2
9	Open cover (6) and remove
10	Mark electrical connectors (7)	Risk of mix-up during installation where electrical connectors (7) are not marked. This results in malfunctions in the hydraulic system.
11	Disconnect electrical connectors (7) and remove soft top control hydraulic unit (A7/5)
	Install
12	Connect electrical connectors (7) with soft top control hydraulic unit (A7/5)	Ensure that no mix-up occurs for electrical connectors (7). Otherwise, malfunctions can arise in the hydraulic system.
13	Install cover (6)
14	Remove stop plugs from hydraulic lines (5) and connect hydraulic lines (5) with soft top control hydraulic unit (A7/5)	Ensure that rags are laid out in the working area. Otherwise, vehicle interior may be contaminated during removal of stop plugs. Observe marking of hydraulic lines (5).
15	Insert retaining plate (4) and tighten screws (3)	Bolt, connection plate to hydraulic unit	*BA77.37-P-1002-01A
16	Insert soft top control hydraulic unit (A7/5) in hydraulic unit container (2)	Handle soft top control hydraulic unit (A7/5) with care. Otherwise, hydraulic lines (5) can be damaged.
17	Install hydraulic unit container (2) with soft top control hydraulic unit (A7/5)	Hydraulic unit container (2) with soft top control hydraulic unit (A7/5) must be positioned on soft top crossmember (9) so that emergency operation valve (10) can be accessed through opening (arrow B) in soft top crossmember (9) using an Allen key (SW4).
18	Check oil level in soft top compartment hydraulic unit (A7/5), correct	Ensure that there are no detached components in area of soft top mechanical components. Otherwise, soft top or components can be damaged.	AR77.37-P-3501RGR
19	Equip hydraulic unit container (2) with new tape (8) and close clamping band (1)	Always replace tape (8).
20	Install HERMES control unit	Model 190.4 with code 360 (HERMES UMTS) Model 190.4 with code 362 (HERMES LTE)	AR82.95-P-0019RGR
21	Install AIRSCARF control unit	Model 190.4 with code 403 (Airscarf system)	AR91.30-P-2006RGR
22	Install SAM control unit with fuse and relay module in rear		AR54.21-P-1271RGR

SOFT TOP HYDRAULIC SYSTEM

Number	Designation		Model 190.4
BA77.37-P-1002-01A	Bolt, connection plate to hydraulic unit	Nm	4

Fig 2: Identifying Record Plug (129 589 00 91 00)

Courtesy of MERCEDES-BENZ USA