W115, Rust Repair

1975 300D Passenger Door Part Missing?

Not sure how to explain this, so apologies up front. In the process of repairing my vacuum door lock system I ran into an issue with the front passenger door. It's different than the other doors. It appears that MB designed this door system to allow you to open the door while the other doors are in locked mode. I think there is a part missing on mine (maybe a spring). The actuator pushes (unlocks) the door knob (stem) up, but when the actuator pulls (locks) the door knob (stem) stays up.

Chassis Model Number

W115

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Body and Interior Specific Aid

Read more about 1975 300D Passenger Door Part Missing?

1975 300D Difficult to add cruise control?

Is it possible to add cruise control to a 1975 300D?

Chassis Model Number

W115

Forums

Diesel Engine Specific Aid

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1975 300D Door Locks Repair

This weekend I repaired 2 doors using the rubber diaphragm kit from this website. However; on the front passenger door the pull/push knob stem seems to be dis-connected from the rod that is controlled by the actuator to lock and unlock door. Not sure what I need to repair, hard to see.

Also, I'm looking for the driver side door lock switch actuator that has the 3 vacuum lines, 1 in and 2 out but can't locate on this site.

Chassis Model Number

W115

Forums

Body and Interior Specific Aid

1975 300D Windshield Leak

The rubber seal around the windshield on my 1975 300D is leaking on both lower corners. The windshield is original and doesn't need to be replaced. Any tips on how to stop the leaks would be greatly appreciated. Thanks.

Chassis Model Number

W115

Forums

Body and Interior Specific Aid

SVO / Biodiesel

Installing a Mercedessource Diesel to Vegetable Oil Fuel Conversion

We offer an easy to install kit or you can build one from our components

1975 300D Adjust idle just a bit.

I would like to adjust my base idle up just a bit on my 1975 300D what's the best way to adjust?

Also, when I adjust the idle from the inside using the dash adjust knob, it seems to have an affect on the linkage making the trottle pedal a tad harder to depress, and it's not as smooth.

Any ideas or info would be appreciated, thanks.

Chassis Model Number

W115

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Diesel Engine Specific Aid

Engine

Inspecting the Voltage Regulator BEFORE it Fails and Leaves You Stranded

Do it very soon unless you know it have been done within the last 50,000 miles.

$6.99

Maintenance - Ratcheting Right Angle Screw Driver with Bits

One of the handiest small tools you can have - bits hold in tight and will not fall out

1975 300D Speaker Vinyl Cover Removal Repair

Mercedes does not carry the speaker vinyl speaker cover any longer. So my next step is to try and repair. How do I remove the cover? it appears that it may snap in and out, but I don't want to force it and break something.

Chassis Model Number

W115

Forums

Body and Interior Specific Aid

1975 300D Post Valve Adjustment Pinging OK?

I adjusted my valves for the first time a few weekends ago. Two exhaust and one intake needed adjustment. Engine runs better but it seems to ping more when it's cold. Is this normal and/or OK. I certain that I did the adjustment correctly. Thanks.

Chassis Model Number

W115

Forums

Diesel Engine Specific Aid

W115, Rust Repair

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