Remove/install brake fluid reservoir - AR42.10-P-0301T

MODEL 211 with Sensotronic Brake Control (SBC) 

MODEL 230 except CODE (P99) "AMG Black Series" special model 

Fig 1: Identifying Brake Fluid Reservoir Components

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Fig 2: View Of SBC Hydraulic Unit & Hydraulic Line

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

	Removing
	Risk of poisoning  caused by swallowing brake fluid. Risk of injury  caused by brake fluid coming into contact with skin and eyes.	Only pour brake fluid into suitable and appropriately marked containers. Wear protective clothing and eye protection when handling brake fluid.	AS42.50-Z-0001-01A
	Notes on repairs to brake system		AH42.00-P-0003-01A
	Brake fluid notes		AH42.50-P-0001-01A
1	Switch off ignition
2	Remove cover (1) on reservoir (7)
	Clean
3	Clean the area around the reservoir (7) thoroughly	Before opening the brake system the area around the separation point should be cleaned thoroughly. Even the smallest particles of dirt, introduced into the hydraulic components, can lead to malfunctions and a total failure of the brake system. Only use clean, lint free rags and cleaner free of mineral oil. Do not use any compressed-air for cleaning when the brake system is open.
		Cleaner from package	*BR00.45-Z-1028-04A
4	Release and detach connector (5) of brake fluid check switch (S11)	Store connector (5) in a protected place. There must be no ingress of brake fluid.
5	Unscrew cap (2) and remove strainer from reservoir (7)	Rinse off any escaped brake fluid immediately with water in order to prevent paint damage.
			*BA42.50-P-1001-01D
6	Mark fill level on reservoir (7) and extract brake fluid
7	Detach hydraulic lines (3a, 3b) to reservoir (7)	Seal connections immediately. Position hydraulic lines (3a, 3b) upwards, to ensure that no brake fluid escapes or to prevent air entering the hydraulic lines (3a, 3b).
			*129589009100
8	Detach hydraulic line (4) to reservoir (7)	Vehicles with transmission 716, except vehicles with code (424) Sequentronic automated manual transmission (ASG) Seal off connection immediately. Position hydraulic line (4) upwards to prevent any brake fluid escaping or air from getting into the hydraulic line (4).
9	Remove screw (6)
10	Pull reservoir (7) out of the brake operating unit (BOU) (8)	The openings of the brake operating unit (BOU) (8) must always be filled with brake fluid up to the edge. Even the smallest particles of dirt, introduced into the hydraulic components, can lead to malfunctions and a total failure of the brake system.
	Install
11	Mount the reservoir (7) onto the brake operating unit (BOU) (8)	Installation:  The seals do not have a collar and they may be pressed out of the brake operating unit (BOU) (8) when mounting the reservoir (7). Position reservoir (7) vertically onto brake operating unit (BOU) (8) while simultaneously pressing in the seal at the front and rear.
12	Fit screw (6)		*BA42.46-P-1002-02A
13	Fit hydraulic line (4)	Vehicles with transmission 716, except vehicles with code (424) Sequentronic automated manual transmission (ASG)
14	Fit hydraulic lines (3a, 3b)
15	Fill the reservoir (7) with brake fluid to 10 mm below the top edge on the filler neck	Pour in the brake fluid by hand. Do not use a bleeder unit so that no air gets into the brake system. Fill reservoir (7) correctly because the overflows to the individual chambers are located right at the top at the reservoir upper shell.
16	Mount plug (5)
17	Press together the hydraulic line (3b) on the SBC hydraulic unit (A7/3) approx. 5 times	To press any remaining air out of the hydraulic line (3b).
18	Press together the hydraulic line (4) as far as possible at the bottom approx. 5-times	Vehicles with transmission 716, except vehicles with code (424) Sequentronic automated manual transmission (ASG) To press any remaining air out of the hydraulic line (4).
19	Correct fill level in reservoir (7) up to marking
	Checking
20	Check leaktightness of connecting points of hydraulic lines (3b, 4)	Connect electrical brake fluid changer/bleeder unit and apply the maximum filling pressure (2.5 to 3.0 bar) statically for 10 minutes. Afterwards check the hydraulic line (3b, 4) most accurately  for leaks at the connecting points (use paper handkerchief). The smallest drips are already an indication of a leak! Brake fluid change unit with supply tank (10-20 l) gotis://B_42/43.2_01.1  A visual inspection on its own is not adequate, because minuscule leaks which are not detectable at first glance, can also lead to malfunctions of the brake system.

Fig 3: Identifying Set Of Stop Plugs (129 589 00 91 00)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.