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92 300TE 4matic
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33 Posts
Discussion Starter #1
I have a 1992 300 te 4matic and I want to add some hydraulic suspension fluid to the reservoir in the engine compartment. When I look to unscrew the top there are two tubes screwed into fittings on top of the lid. I am concerned about unscrewing them from the lid and having air enter into the system. How does one properly fill the reservoir? I have looked in the manual and found no reference on this. It is probably simple, but I do not want to muck things up. Any help is appreciated.

Thanks,

Burl
 

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W124 400E, W126 500SE
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971 Posts
In the centre of the reservoir, there is a rubber plug with level indication... pull that out :)
 

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About a dozen 1988, 1989, 1990, and 1991 sedans, wagons, 4Matics and 1 coupe
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5,454 Posts
No unscrewing of anything necessary. You just grab that rubbery post-looking thing in the middle of the cap and wiggle it up and out of the reservoir. It's a dipstick.
Don't worry about getting air in the system. The reservoir is open to atmospheric air since the reservoir is vented.
 
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