Check condition and leak-tightness of fuel system - AP47.00-P-4750TZV (with Gas-tight fuel tank)
WARNING: This page does not describe the selected car, but rather 28 other vehicles, including the 2012 Mercedes-Benz GL550, 2012 Mercedes-Benz GL450, 2011 Mercedes-Benz ML63, 2011 Mercedes-Benz ML550, and 2011 Mercedes-Benz ML350. However, it is still accessible from the selected car via links, so may be relevant.
ENGINES 272 in MODEL 164, 204, 207, 211, 212, 251 with CODE (917) Gas-tight fuel tank
| Checking | |||
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| Risk of death caused by vehicle slipping or toppling off of the vehicle lift | Align vehicle between columns of vehicle lift and position four support plates at vehicle lift support points specified by vehicle manufacturer. | AS00.00-Z-0010-01A | |
| Risk of explosion caused by fuel igniting, risk of poisoning caused by inhaling and swallowing fuel and risk of injury to eyes and skin caused by contact with fuel | No fire, sparks, open flames or smoking. Pour fuels only into suitable and appropriately marked containers. Wear protective clothing when handling fuel. |
AS47.00-Z-0001-01A | |
| Preconditions for leak test are cleanliness, accessibility and thoroughness | Cleanliness: - Remove fuel remains outside the fuel system. - Allow vehicle to flash off. Accessibility: - The best possible solution is to remove service flaps and covers. Thoroughness: - Carry out the test systematically and with care - For positive measurements: Clean position and repeat test. |
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| 1 | Close purging switchover valve (Y58/1), to do this use STAR DIAGNOSIS | Menu guidance: - Engine control module - Adaptations - Fuel tank leak test |
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| Connect STAR DIAGNOSIS and read out fault memory | AD00.00-P-2000-04A | ||
| 2 | Detach purge line (C) at purging switchover valve (Y58/1) | ||
| 3 | Disconnect vacuum tester from purge line (C) | Fig 3 | |
| 4 | Apply pressure to fuel system with overpressure | Readjust until overpressure remains stable. Overpressure value: 70 mbar or 1.0 psi |
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| 5 | Sniff fuel system at constant overpressure or check for substance concentration due to escaping gas | Concentration value: Maximum 5 ppm (ppm → parts per million) Repeat test when the limit value of 5 ppm is exceeded. Peaker 3000 flex (article number 61010753) www.umweltsensortechnik.de |
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| 6 | Disconnect vacuum tester from purge line (C) | Fig 3 | |
| 7 | Fasten purge line (C) to purging switchover valve (Y58/1) | Replace hose clamp. | |
| 8 | Open purging switchover valve (Y58/1), to do this use STAR DIAGNOSIS | Menu guidance: - Engine control module - Adaptations - Fuel tank leak test |
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| Connect STAR DIAGNOSIS and read out fault memory | AD00.00-P-2000-04A | ||
| Risk of accident caused by vehicle starting off by itself when engine is running. Risk of injury caused by contusions and burns from working on the vehicle as it is being started or when the engine is running | Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts. |
AS00.00-Z-0005-01A | |
| 9 | Test run engine and check fuel line for leak-tightness |