Removal and installation of accumulator - RA42001400819X(42-0819)
WARNING: This page does not describe the selected car, but rather 42 other vehicles, including the 1999 Mercedes-Benz S600, 1999 Mercedes-Benz S500, 1999 Mercedes-Benz S420, 1999 Mercedes-Benz S320, and 1999 Mercedes-Benz CL600. However, it is still accessible from the selected car via links, so may be relevant.
Operation no. of operation texts and work units or standard texts and flat rates
- Models 124, 126, 201
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Ignition OFF . Hydraulic system depressurize. Open bleed screw "SP" at ASR hydraulic unit (A7/3) approx. 1 turn, drain entire accumulator contents into the receptacle for brake fluid. Cover hoods unclip or remove after slackening the screw, put on. Electrical connector detach from the ASR hydraulic unit (A7/3), replace. Follow installation note. Hydraulic lines (12, 14) unscrew, screw on at the connections "P" and "E" on the ASR hydraulic unit (A7/3). Only use 9 x 11 mm double ended flat flare nut ring wrench for slackening, 15 Nm. Seal connections. Steering wheel turn to the left as far as the stop. Left front wheelhouse lining remove, install. Nuts (13a) unscrew, screw on. Pressure accumulator (13) with lines (12 and 14) withdraw to the front, install. ASR hydraulics bleed and check for leaks (42-010). ASR hydraulics test program perform (42-0824 or Diagnosis Manual - Chassis). Models 124.034/036
Fault memoryreadout and erase in accordance with Diagnosis Manual - Chassis. Special tools
NOTE: Only use commercially available double ended flat flare nut ring wrench to slacken the brake lines.Seal hydraulic lines and connections with blind plugs.
Installation note
When installing the hydraulic lines, clean sealing surfaces of swarf and dirt.
The plug connection (16) must engage audibly when connecting.
Markings on the ASR hydraulic unit (A7/3):
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Check line routing:
- Pressure accumulator connection "P" -ASR hydraulic unit (A7/3) connection "P",
- Pressure accumulator connection "E" -ASR hydraulic unit (A7/3) connection "E".
- Model 129
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Ignition OFF . Hydraulic system depressurize. Open bleed screw "SP" on ASR hydraulic unit (A7/3) approx. 1 turn, drain complete contents of accumulator into the receptacle for brake fluid. Cover hoods (3 and 17) unclip or remove after slackening the screw (2), put on. Electrical connector detach from ASR hydraulic unit (A7/3), replace. Hydraulic lines (12, 14) Follow installation note
Unscrew from, screw on to the connections "P" and "E" on the ASR hydraulic unit (A7/3). Only use 9 x 11 mm double ended flat flare nut ring wrench for slackening, 15 Nm. Seal connections.Nuts (15) unscrew, screw in at vehicle floor. Pressure accumulator (13) remove, install with the lines (12 and 14) using a rotary movement upwards.
Before installation, align the lines on pressure accumulator and tighten.ASR hydraulics bleed and check for leaks (42-010). ASR hydraulics test program
Model 129.067/076
Fault memoryperform (42-0824, or Diagnosis Manual - Chassis) readout and erase in accordance with Diagnosis Manual - Chassis. Special tools
NOTE: Only use commercially available double ended flat flare nut ring wrench to slacken the brake lines.Seal hydraulic lines and connections with blind plugs.
Installation note
When installing the hydraulic lines, clean sealing surfaces of swarf and dirt.
Electrical connector (16) must engage audibly when connecting.
Markings on the ASR hydraulic unit (A7/3):
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Check line routing:
- Pressure accumulator connection "P" -ASR hydraulic unit (A7/3) connection "P",
- Pressure accumulator connection "E" -ASR hydraulic unit (A7/3) connection "E".
- Model 140
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Ignition OFF . Cover hoods (3 and 17) remove, install. Hydraulic system depressurize. Open bleed screw "SP" on ASR hydraulic unit (A7/3) approx. 1 turn, drain complete contents of accumulator into the receptacle for brake fluid. Tension relief remove, install. Plug connection detach from ASR hydraulic unit (A7/3), attach. Hydraulic lines (12, 14) Follow installation note (item 1)
unscrew, screw on at the pressure accumulator (13). Only use (9 x 11 mm) double ended flat flare nut ring wrench for slackening, 15 Nm. Follow note.Side panelling detach, install between driver's door and front fender. Plastic panelling detach, assemble. Stiffening bracket press to one side, mount. Pressure accumulator (13) remove, install.
Before installing, align the lines to the pressure accumulator and tighten.
Follow installation note (items 2 and 3).Retaining plate remove from, install at pressure accumulator. Hydraulic system bleed (42-010). ASR hydraulic test program perform in accordance with Diagnosis Manual - Chassis. Fault memory readout and erase in accordance with Diagnosis Manual - Chassis. Special tools
NOTE: Only use commercially available double ended flat flare nut ring wrench to slacken the brake lines.Seal hydraulic lines and connections with blind plugs.
When installing the hydraulic lines, clean sealing surfaces of swarf and dirt.
Installation note
- Electrical connector (16) must engage audibly when connecting.
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Markings on the ASR hydraulic unit (A7/3):
- Before installing, align hydraulic lines (12 and 14) to pressure accumulator (13) and tighten.
- Checking line routing:
- Pressure accumulator connection "P" - ASR hydraulic unit (A7/3) connection "P",
- Pressure accumulator connection "E" - ASR hydraulic unit (A7/3) connection "E".
- Electrical connector (16) must engage audibly when connecting.