Replacing Mechatronics (GA6HP26Z/6HP32Z)

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CAUTION: After completion of work, load specific data version with DIS. Check transmission fluid level. See CHECKING/TOPPING UP FLUID LEVEL IN AUTOMATIC TRANSMISSION (GA6HP26Z/6HP32Z) . Use only the approved transmission fluid. See RECOMMENDED FLUID . Failure to comply with this requirement will result in serious damage to the automatic transmission.

E65 only: unfasten nut. See Figure . Remove cable (1). Upon installation, adjusting cable:

Release nut
Adjust cable by means of holder (2) until spacing A = 1 mm is obtained
Tighten down nut

E60/ E53 only: grip clamping sleeve (1) and slacken nut (2). See Figure . Detach retainer (3) towards bottom using a screwdriver. Pull cable (4) out of holder. Upon installation, adjust selector lever. See ADJUSTING SELECTOR LEVER .

Secure lever (1) with a cable tie (2) or wire in vertical position. See Fig 1 . Illustration shows E65.

Fig 1: Securing Lever

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CAUTION: Mechatronics can be destroyed by static discharges. Therefore the contacts inside the plug must not be touched. Insert special tool immediately after work step.

Unscrew plug (1) and disconnect. See Figure .

Insert Special Tool (24 2 390) in sealing sleeve (1). See Figure .

Remove transmission oil sump. See REMOVING AND INSTALLING/SEALING OR REPLACING TRANSMISSION SUMP (GA6HP26Z/6HP32Z) .

Unlock sealing sleeve with slide (1). See Figure .

Note position of sealing sleeve. Pull out sealing sleeve (1). See Figure . Upon installation, screw in sealing sleeve partially (lug in upper area). Turn until lug engages in groove of transmission. Slide in sealing sleeve. Lug on sealing sleeve must not be damaged.

Release all screws (1 and 2). See Fig 2 . 1 = M6 x 58 mm. 2 = M6 x 20 mm. Remove mechatronics.

Fig 2: Removing Mechatronics

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NOTE: Mechatronics without protective bar for solenoid valve must not be reused after removal. See Fig 3 .

Fig 3: Identifying Mechatronics Without Protective Bar

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NOTE: Fit/reuse only mechatronics with protective bar (1) for solenoid valve. See Fig 4 .

Fig 4: Identifying Mechatronics With Protective Bar

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Installation: check gaskets (1 and 2) for damage, replace gaskets if necessary. See Fig 5 . Coat new seals with automatic transmission fluid and install.

Fig 5: Locating Gaskets

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CAUTION: Tighten down screws in order. Failure to comply with this requirement will result in serious damage to the automatic transmission.

Installation: insert screws (3) alternately until contact is made with each screw head. See Fig 6 . Insert all further screws contact is made with each screw head. Tighten down screws in order 1-10. See Fig 7 . Tighten to specification. See TORQUE SPECIFICATIONS .

Fig 6: Installing Mechatronics

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Fig 7: Identifying Tightening Order Of Mechantronic Screws

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