I plan on removing my cluster soon. On all of the DIY pages it doesn't mention the oil pressure gauge. Is this a plug type cable? Or do I unscrew it?

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1982 300D Turbo

you need a 10mm open ended wrech to unscrew it.

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1985 300TD Turbo Euro-wagon
1979 280CE 225,200 miles
1985 300D Turbo 264,000 miles
1976 240D 190,000 miles
1979 300TD 220,000

GONE but not forgotten
1976 300D 195,300 miles
1983 300D Turbo 175,000 miles

http://i42.photobucket.com/albums/e3...e485-1-2-1.jpg

And a 13mm to hold the fitting on the back of the gauge to not stress the connection to the back of the gauge.

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1979 240D- 316K miles - VGT Turbo, Intercooler, Stick Shift, Many Other Mods - Daily Driver

1982 300SD - 232K miles - Wife's Daily Driver

1986 560SL - Wife's red speed machine

Remember to NOT start the engine with the cluster out.

wow..follow what they said and you wont have any problems, especially about not starting the car (I learned that the hard way!)

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". . .back before accountants designed cars"

-Current Stable-
'78 MB 450SL-C 107.024.12.020783 #3840 <Kayleen>
'85 FORD F250 6.9L Diesel <Allison>
'98 Lexus ES300 <Rachel>
Long Gone...
'74 Chevy G10...........................'99 GMC Yukon 4X4
'83 Chevy Suburban 6.2 diesel .....'99 SAAB 9-5
'90 Mitsubishi Eclipse GS............. '01 Chevy Tahoe
'98 Nissan Altima .......................'02 MB ML320
'88 Chevy Suburban V2500 4X4 6.2 diesel

Why do you not start the engine with the cluster out?

The oil line for the pressure gauge will be open and you'll get covered with engine oil.

Be sure to disconnect the bracket that holds the speedo cable in the engine compartment. Follow the cable down from where it comes through the fire wall. This will give a tad more room behind the cluster for disconnecting things. Often the bracket tie is missing because some wrench didn't replace it.

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1985 Euro 240D 5 spd 140K
1979 240D 5 spd, 40K on engine rebuild
1994 Dodge/Cummins, 5 spd, 121K
1964 Allice Chalmers D15 tractor
2014 Kubota L3800 tractor
1964 VW bug

"Lifes too short to drive a boring car"

Just for "general priciple" disconnect the battery first, to prevent accidental shorting of the circuit board.

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Dave
1983 300D Daily Driver

Just to clarify what Forced Induction said - this is not a "modern" sensor on the engine setup that then sends an electrical signal to the gauge. There is an oil line run from the engine to the gauge and the gauge is directly reading this pressure. If this line comes loose you've got oil at full pressure spewing out. Not a pretty sight.

It is funny though.

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1979 240D- 316K miles - VGT Turbo, Intercooler, Stick Shift, Many Other Mods - Daily Driver

1982 300SD - 232K miles - Wife's Daily Driver

1986 560SL - Wife's red speed machine