BENZ AID - COMMON QUESTIONS AND ANSWERS

116 Idle Adjustment Cable for 1984 300SD

I am trying to retrofit an idle speed adjustment cable from a 116 300SD onto a 126 1984 300SD. (The 126 did not come with one.) Besides the obvious reason of variable idle speed control, the original tang that holds the idle adjustment screw on the side of the injector pump has broken off, thus making idle non-existent. The car in question has 363,000 miles and I really don't want to replace the injection pump just for the idle control. Currently, I'm controlling the idle with a long bolt attached to the throttle linkage, the end of which is resting on the side of the valve cover. This repair has actually worked for about 5 years now, but I would really like to try the cable.

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Diesel Engine Specific Aid

82 300SD Fuse box electronic switches

I am in the process of installing the Elsbett conversion kit to single tank and was looking for the best place to cut in the electronic relays. I looked at the fuse box and see seven relays. Looking at the manual I discovered one is the Compressor relay (code J) but I can't find the rest. I find a K an L an F and a B and one each alongside the F and B. Any help would be great.
Thanks,
Kevin

Chassis Model Number

W126

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SVO Fuel Conversion Specific Aid

a/c compressor leaking at line connections

I am having trouble with the A/C compressor on my 1984 300D.
It appears that there were several hose-block connections and compressor connection configurations.
I ordered a new compressor (for a different car). It came with the adapters and instructions. Unfortunelty, I'm having trouble understanding them.
I can't get the compressor to stop leaking at the hose connections in the rear.

Chassis Model Number

W123

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Body and Interior Specific Aid

1983 300SD Turbo: Light black smoke at idle

The symptom is unburned fuel at idle. A light puff-puff of black smoke -- not heavy, but visible, at 700-750 rpm with car in gear and A/C on. Much less smoke when the tranny is in neutral, A/C off, and engine is idling at 800 rpm. The presence (or absence) of an air filter has no effect. Except for this bit of smoke, which is embarrassing at stoplights, the car runs and shifts great. 0-60 in 14.5s, and I measured 10 psi boost during hard acceleration. On long trips getting 20-22 mpg (milage verified with GPS).

Chassis Model Number

W126

Forums

Diesel Engine Specific Aid

1985 300d diagnosing transmission leaks ??

I have developed a transmission leak, originally i thought it was the pan gasket so i replaced the filter and put on a new gasket. that didnt work it is still leaking. i think it is comming from where the dipstick tube goes into the transmission, or maybe the transmission cooler line, i have tightened the cooler line and it still seems to be leaking. if anyone has any sugestions i would be most greatfull.

Chassis Model Number

W123

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Transmission / Suspension Specific Aid

85 300CD no charge to battery

I'm not getting charging to the battery. I have replaced the voltage regulator on the alternator (the old regulator brushes where about worn out), but did not get any change in the charge to the battery. At idle, voltage to battery shows 11.9v and dropping. When rpm increased, voltage will increase to 12.35v max, than right down below 12v when back to idle. What am I missing?

Chassis Model Number

W123

Forums

Diesel Engine Specific Aid

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