300E 4MATIC (124.230) L6-3.0L (103.985) (1990)
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Unscrew the hydraulic lines of the front axle drive train (AV) and center differential lock (ZS) on transfer case and hold in container. Start engine and
allow to idle until the hydraulic oil escapes without any bubbles (approx. 20 seconds).
As of transfer case no.26 617
Open vent valves (EAV, EZS).
Start engine and allow to idle until hydraulic oil escapes without any bubbles (approx. 20 seconds).
6 Then correct hydraulic oil level in oil reservoir.
