BENZ AID - COMMON QUESTIONS AND ANSWERS

A/c and Heater '83 300SD

I've seen this question on here before. But I never saw the fix. I turn on my AC or heater on low fan speed it works just fine. But if your hot or cold and turn the fan to high speed it runs fine for abuot three mins.Then it's off for about 1 min. on for 5 secs. off for 5 secs. it dose this for about 5 mins. then it will run for about 1 1/2 mins. and starts this all over again. It also dose a screeching sound under the dash on and off too with the no and off. Is there a hight limit on the fan or somthing? Thank for any help the weather is starting to heat up

Chassis Model Number

W124

Forums

Body and Interior Specific Aid

Veggie tank faulty Sending Unit

i'm having some trouble with my sending unit in the veg tank. when the gauge reads half it is actually empty. does anyone have experience with this problem? i'm sure i could take the tank out and clean the unit, but i'd rather not. maybe i could fill the tank with diesel or biodiesel and that would clean out the gunk in the sending unit. thanks matt

Chassis Model Number

W126

Forums

SVO Fuel Conversion Specific Aid

'87 300DT - When To Replace Primer Pump?

I have an '87 300DT sedan, 603.960 engine, 143500 miles. Reading thru my electronic copy of the W124 Service Library concerning the fuel primer pump, it lists the minimum pressures it should be able to achieve at idle and at a certain rpm. Measured at the supply line between the cartridge fuel filter and the inlet to the injection pump, doing the conversion from bar to psi, it looks to indicate that the primer pump should obtain a minimum pressure of 4 1/2 psi at idle. I have an underhood fuel pressure gauge installed (Mr Gasket 15 psi from Advance Auto) in the line specified in the FSM. Initially idling cold, it registers 6 psi. After driving 20 miles to work, idling when hot it registers 5 psi.

Chassis Model Number

W124

Forums

Diesel Engine Specific Aid

Upgrading Alternator Amps for DTC

Greetings from Columbus, Ohio. My 1982 Mercedes 300D Turbo Diesel has a glorious Mercedessource DTC system! Only problem I am experiencing is that the alternator can not reliably keep up with the electrical demands. What ampere level would be a good upgrade (150 amp to 300 amp?) and do you have any specific brand/model of alternator you recommend? Trying to eliminate the risk of producing too many amperes as well (if that is even a concern). Many thanks and keep on Greasing! --- Chris Konik

Forums

SVO Fuel Conversion Specific Aid

Taxonomy upgrade extras

SVO/WVO
Questions and Answers

Chassis Model Number

W123

Door Locks 93 300D 2.5

After locking my doors with the key all four lock knobs pop open on there own after about 45-60 sec. I can hear a wirring sound comming from the back seat. I am assuming I have a vacuum leak somewhere or a malfunctioned pump under the back seat. Could the door vacuum actuators be faulty? I am trying to keep this simple at first before I need to take the door panels off. Thanks for your help Mike Stillwater, Minnesota

Forums

Diesel Engine Specific Aid

Taxonomy upgrade extras

Tips

Chassis Model Number

W124

AT Metal Cooler Line Leak

I have an '83 W123 & have just noticed a fast drip coming from the area of the automatic transmission cooler line on the right/passenger side - along the engine & at the very point where the line bolts to the oil pan. I assume that this is the same problem mentioned in the "Alert" section. Question is, aside from the preventative fuel hose replacement, what sort of actual "fix" can be applied to stop & solve the leak? Has anyone fully repaired a leaking AT cooler (metal) line? thanks, Kieran- NJ

Forums

Body and Interior Specific Aid

Taxonomy upgrade extras

Questions and Answers

Chassis Model Number

W123

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