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Warning messages in multi-function display if vehicle is too low. (Alternatively set the divider to 106.5mm and scribe across the PCD in two places.). diagonally opposite in the casing. 101 Share 50K views 2 years ago When there is an issue with vehicle height the Mercedes Benz system has to be leveled. However, you can buy aftermarket 4x2.5mm nylon high pressure flexible pneumatic lines of any length which are much cheaper than OEM lines (search keyword "4mm Hose Flexible Nylon Natural / Tube Pneumatic Air Line / 5m Roll"). The damping force levels are achieved by this hole. Unscrew bolts (86d) on retaining plate (86a) and remove front left and right level sensors (B22/8, B22/9), After replacing the level sensors, calibrate vehicle level with Star Diagnosis (level calibration), Nut, level sensor connecting rod to upper wishbone: 10 Nm, Nut, connecting rod to level sensor: 5 Nm, Bolt/nut of level sensor to retaining plate: 4 Nm, Disconnect plug from rear axle level sensor (B22/3), Unscrew nut (85e) of control rod (85) from stabilizer bar intermediate lever (81). At the same time air The Level Sensor (1) function is to detect the vehicle height at the front axle and rear axle and supply the values to the AIRmatic with ADS control module. valve unit until the vehicle level has been adjusted. Fault in component Y53y1 (Left rear solenoid valve 1) in assembly Y53 (left rear axle damping valve unit). Plug the pressure line for the duration of the repair operations, Pull off grommet and disconnect electrical connector of damping valve unit (Y53x1/ Y54x1). Drill a 4mm hole and if necessary insert a screw or similar device part way into the nylon plug which can then be pulled out. Three possible damping levels for comfort, sport or extreme sport driving styles in vehicles produced after 09/99. As an example this last test does the following; Central reservoir charge valve (in valve block) is opened. I'm going to take Dave's advice on this one. For maximum longevity dry it at just 80C. Introduced on the W220 S-Class for the 2000 model year, Mercedes-Benz began equipping various models throughout their lineup with an air-suspension system dubbed "Mercedes-Benz Airmatic". The vehicle particularly high pressure demand. However, for the longevity of our vehicles, it is recommended to change the desiccant along with the air filter at some point. (. level at the front axle is recorded by two level sensors at the front Otherwise the fuel consumption may increase and handling may be impaired. Oxidation layer can be cleaned with some reagent. Mercedes S Class w220 Airmatic Leveling | PDF | Axle | Transport - Scribd The body fold must lie in the groove of the limp-home buffer. Slowly lower vehicle and make sure that the torsion bar (77) makes contact with the The part that leaks is a half metal and rubber cap under the black epoxy and is secured with a metal lock ring. A very strong magnet can help.) The Front axle air spring strut (40) consists of three main systems: The coponents of the front axle spring strut are shown in the figures below. the air drier the dehumidified and compressed air then passes from 10 See Actuation of level valves and observe level sensor voltages. Since Bilstein is OE manufacturer for W220 AIRmatic struts, it is possible to buy OE struts directly from Bilstein much cheaper. Just be careful to not round the hex head. It didn't work. It is a complicated process that takes time. Douse with the whole assembly with WD40 or similar and wriggle, wriggle and wriggle until the two halves of the valve block come free. temporarily in order to prevent an overload. The struts get air via a valve distribution unit from an air compressor located behind the front bumper close to the front right wheel well. (Note: a new top seal metal disc cover and a new 'O' ring are provided in the top seal kit, see below. Failure is caused by the Air Spring Air Bag/Bladder (h) chafing against the protective alloy dust cover over time. Part 3 W220 Airmatic Testing airmatic valve assembly - YouTube The impact wrench shocks the nut undone.). Unlike the OE Air Bag/Bladder, re-manufactured ones usually use two ply rubber design that prevents vertical wear points and the Air Bag/Bladder is usually over two times thicker than the original one. ), Use an air impact driver to undo the lock nut on the top of the damper piston rod (e). Usually instrument cluster will show malfunction and AIRmatic control unit will report an error: There are two level sensors for each front wheel and one for the rear axle. Bestseller No. However, silica gel degrades after very few cycles if heated to 110C or more. However the strut must be filled while the protective boot/bellows (n) is aligned to the Damper Support Bearing. 14 Enter in the inclination angles as measured or alternatively enter the angles shown in the example. How To Release The Air From A Mercedes-Benz AIRMATIC Air-Strut - FCP Euro Arnott claims [2] that their products use an improved double thickness air spring bag/bladder manufactured by Continental which provides longer lifetime than the OE. In this case a message appears on the multifunction display in the instrument cluster to warn the driver: "Stop car too low". wheelhouse. Electronic level control which maintains a constant even level at the front and rear axles according to the driving and vehicle load conditions. Another common weakness in the pre '03-ish W220's compared to those from a few years later, is the seals at the tops of the front suspension struts. A piece of masking tape over the holes is a short term solution. How To Reset AIRmatic Suspension w211, w220, w221? W220 base, right rear . "Sports 2" - both indicator lamps (1) are on (on vehicles produced after 09/99). Make sure that all valves are under pressure (struts and reservoir have pressure in them). Remove the complete front axle AIRmatic spring strut (40) from the vehicle. The "Sport 2" setting immediately sets the damping force to "hard". In the event of electrical faults in the AIRmatic or ADS system, the following message appears on the multifunction display in the instrument cluster: "AIRMATIC VISIT WORKSHOP!". Slacken suspension strut (40) on ball joint of spring control arm (17) using a suitable lever. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. After Compressor turned off the Central Reservoir pressure = 7.41177 bar. If the crack is large it may suffice to push air in the line and locate damaged point by hearing hissing sound. The filter can fill up with debris and salt which may block the air filter/cleaner. At the rear axle both level control valves (y3 and y4) close when the vehicle level averaged between the right and left wheel corresponds to the specified level set by the control module. 107 on the BenzWorld R/C 107 forum. Thread a nut right to the top of the 10mm bolt and add a flat washer with a little bit of grease. The AIRmatic with ADS Control Module (N51) receives input signals over CAN Bus from the following components: The input signals are converted in the AIRmatic with ADS Control Module (N51) to output signals for the following components: The Air Suspension Spring Strut takes over all the functions of suspension, level control, level adjustment and damping to be carried out. Located on the AIRmatic Compressor Unit in the right front fender, the Level Control Valve Unit (Y36/6) is the central control unit for the level control, level adjustment and suspension. After the 120 elapsed time the final compressor pressure ('P' line) = 10.8431 bar. stationary the pressure from the reservoir is used for noise The "Sport 1" setting makes the damping somewhat "harder". An electrical compressor is used to supply pressure. Airmatic - W220 S-Class Encyclopedia Airmatic Contents 1 Introduction 2 Description 3 Features 4 Advantages 5 Function 5.1 Pressure Supply Function 5.2 Level Control Function 6 Components 6.1 Location of electrical/electronic components 6.2 Location of pneumatic/hydraulic components 6.3 Compressor and cable related parts The compressor unit is mounted to a mounting plate (h). The newer seals have rubber mastic compound poured in the center to seal the circumference of the upper metal cap on the upper part of the front strut and to keep the brass fitting from breaking off. A mechanical spring version of the complete suspension strut which eliminates the pneumatic parts can be bought from Strut masters. See Level calibration, read the disclaimer, then F2 in order to actuate the level valves. Only a small amount of oil is displaced via the piston The fault is stored in the ADS suspension control module and can be read out using the diagnosis tool. It is possible that the pressure line to the strut develops cracks or micro cracks. These include a leak in the Airmatic valve assembly, leak on t. Usually, in case of valve block leak the vehicle will not be completely down, since the residual pressure holding valve at the air inlet to the struts will prevent the pressure dropping below a pressure of 4-5 bar. A new AIRmatic air filter costs around EUR 10, and it should not take more than 20 minutes to replace. The main part of the AIRmatic Compressor Unit (A9/1) is the compressor motor (m1). Edit: Also, the metal link that connects the sensor to what I think is the rear sway bar, was on the middle of it's range. The AIRmatic Pressure Sensor (B7) is located in the right front fender on the AIRmatic Level Control Valve Unit. just do calibration by measuring distance between wheel hub and arch, aaa, I thought iC is capable of it lol, OK, so I'm glad i haven't been calibrating them the long way round all these years using 4 post lift, angle finder and SDS. A side note; pressure has basically nothing to do with height (as far strut is on its free moving range, not in the hard stop end). Use a dielectric grease sparingly on the o-rings. Seal off the pressure lines immediately to keep clean by placing the exposed ends in small plastic bags sealed with tape. Information reported by level sensors can be viewed using DAS. Pressure sensor can be replaced separately. 1. Link for rear level sensor A2203200032 (EUR 40). Connectors of damping valve unit and rpm sensor. On the right-hand side of the vehicle remove the wheel and part of the wheel house inner panel in front fender. If the car is within the voltages specified in the page before, the car will accept the new level setting, if not it will reject it, and you will need to repeat t he procedure. Use a small screw driver to lever the disc out. See Control unit adaptations, highlight Level calibration, F3, J. The water molecules become trapped so that the air is dried out as it passes through the filter. Front wheel speed signal, left and right: Using the wheel speed signal, the ESP control module calculates. It is best to paint the solution on rather than spray it which creates heaps of unnecessary bubbles. Before replacing a supposed leaky AIRmatic strut, always carry out a leak test on the head bearing using soapy water. Note: The original silica gel drier beads are multi sized and a volume is calculated (gaps of air between the beads). If it were my car and my problem, and I did not have SDS, I would: Dave is right, though in the absence of SDS--which I agree is mandatory when working on these cars--Wally does seem to have a good alternative here. The level control is partially switched off depending on the fault that occurred. Remove engine compartment paneling (right front part only). It supplies the AIRmatic front and rear spring struts (40, 41) and the AIRmatic Central Reservoir (42) with compressed-air. Inspect for an indication of leaking. At the same time the suspension is set to either sporty or regular. 11 Use the + and - buttons to lower or raise the car. Replace the complete air line with an aftermarket high pressure flexible nylon pneumatic line. Support the car on stands. Jack up one side of the car as required. Thread Rating: The raised level switch position is indicated by the red indicator lamp (1) in the switch. The system always strives to maintain the selected vehicle level. chambers of the single-pipe gas-filled shock absorber. This is essential, for example, when changing a wheel or during repair work (lifting platform). The AIRmatic Central Reservoir (42) pressure is between 13 and 16 bar (1,300 and 1,600 KPa or 189 and 232 psi) (at sea level). Note: The arrow on the air filter shows the 'UP' direction and not the direction of air flow which is both ways. Front air shock replacement (by BILSTEIN), Front air shock replacement (by David Prokity), Location of electrical/electronic components, Location of pneumatic/hydraulic components, Design of Level Control Valve Unit (Y36/6), AIRmatic Suspension Spring Strut (40, 41), Design of Air Suspension Spring Struts (40, 41), Function of Adaptive Damping System (ADS II), Design of Damping Valve Unit (Y51, Y52, Y53, Y54), Components of Damping Valve Unit (Y51, Y52, Y53, Y54), "AIRMATIC VISIT WORKSHOP!" This reduces the waiting time required to correct the vehicle level and the vehicle is ready for driving more promptly. As a comparison, after replacing the Level Control Valve Unit (Y36/6) or Valve Block with a BRAND NEW OEM part, the following result was obtained for a leak test between valve block (Level Control Valve Unit (Y36/6)) and central reservoir. Find someone who can. Also many of the older style front strut have now been modified with mastic or epoxy added. B. The Facelift W220 will suffer from less rust than the early S Classes. The With increasing speed, ride height is reduced by up to approximately 3/4 in (20 mm). All W220 vehicles come with Airmatic pneumatic suspension system, unless vehicle has option code The vehicle chassis ride height is raised or lowered according to the selected level setting and to the vehicle speed the vehicle should be stopped immediately and measures taken. Fault in electrical solenoid valve. AIRMatic Calibration?? | Mercedes-Benz Forum - BenzWorld.org Moisture will accelerate oxidation of aluminium parts (e.g., valve block). reed valve pack (p). Visually check that the centre pop marks match the pitch circle diameter (pcd) of the strut top plate mounting bolts. As an example, the following result was obtained for a leak test for a FAULTY 'P' line to Level Control Valve Unit (Y36/6) or Valve Block. Two possible damping levels for comfort or sport driving styles in vehicles produced up to 08/99. This is installed in the AIRmatic Compressor Unit (A9/1). Raising vehicle level for poor road surfaces and when negotiating driveways. For this purpose a strut bypass valve below can be used. Signal from level sensors (B22/8, B22/9, B22/3): Both front axle level sensors each supply 2 signals. Mercedes documentation claims that desiccant used for air drying is maintenance free. It must be ensured that the battery voltage is sufficient to then start the engine. We did not have to use. AIRmatic residual pressure holding valve tool. They do not necessarily need to be exchanged for a new suspension strut. Unfortunately the valve block can not be dismantled for inspection and cleaning thus a new Level Control Valve Unit (Y36/6) was required. Attach cover (arrow) in parcel shelf. A common fault is rust on the link of the rear level sensor. There are two level sensors (B22/3, B22/8) for each front wheel and one for the rear axle (B22/9). It is difficult to get reliable information about the scheduled maintenance interval on the AIRmatic air filter. B24/3 - Left front body acceleration sensor, B24/4 - Right front body acceleration sensor, B24/6 - Right rear body acceleration sensor, K40/7 - Right front fuse and relay module, Y52 - Right front axle damping valve unit, Power supply - A1685453628 (from compressor relay K40/7kO), Pressure release valve - A1685452928 (from AIRmatic control module N51), P - Air compressor (opened or closed by pressure release valve in the compressor unit (A9/1)), y5 - AIRmatic central reservoir charge valve, b - Pressure relief/residual pressure valve, All 3 sensors have the same part number A0105427617 (EUR 150 OE, EUR 70 aftermarket) or A0105427717 (for vehicle with. Signal from body acceleration sensors (B24/3, B24/8, B24/9): The vertical acceleration of the vehicle is calculated using the signals from the body acceleration sensors. The residual pressure in the strut will prevent the bolt from being removed. Seal off the exposed pressure line ports immediately with blind plugs if possible. The raising sequence will then take an unusually long time. This plastic protective boot/bellows is designed to prevent dirt and contamination getting to the air spring bag/bladder. Disconnect left front axle multiple circuit junction connector, major assembly compartment (X62/7) right front axle multiple circuit junction connector, major assembly compartment (X62/6). vehicle level to be controlled when the engine is not running. (Note: This is the cheaper option but requires dismantling the failed Suspension Strut. in which case the vehicle is equipped with Active Body Control (ABC) hydraulic suspension system with additional computer control. Each strut has an air spring containing an air bag (bladder) and a dampener built-in to the one unit. The air filter is protected with a protective boot. Dust cover and protective boot called a bellows, Air spring (strut top, residual pressure holding valve (k), seals, air bag/bladder (h) , strut tube (a)). On the underside of the metal block around the ports which the solenoid pins engage, there are some very small slots which marry up with some very small plastic moldings on the solenoid block. solenoid valve pistons (y1, y2) keep the holes directly below them closed. it is lowered to the normal level by relieving the pressure. Incorrect wheel speed signals are also detected. K. See Actuation of level valves and observe level sensor voltages eg; FL 2.61, Fr 2.43, Rear 2.53. The AIRmatic Level Control Valve Unit (Y36/6) is attached to the same A single-tube gas-filled damper unit or shock absorber is integrated into the air spring strut. Gas pressurized damper or single-tube gas-filled shock absorber. Stores compressed air for level control. This needs to be done using a Mercedes Benz Diagnostic tool. Leak test between valve block and suspension struts. It is a good option if the damper unit is in good condition. means of the differently positioned reed valve packs and Signal from level adjustment switch (N72/1s2): The control module uses the signals from the level adjustment switch to determine the driver's preferences for the vehicle level: The control module uses the vertical body acceleration, longitudinal and lateral acceleration of the vehicle and the ground speed to determine the optimum level of damping.

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