W110 W111 W112 Sedan, BENZ AID - COMMON QUESTIONS AND ANSWERS

Will not power past 75 mph! Slight loss of power uphill.

Hello, I have a 1984 300sd with 230,000 miles. Did alot of work to it, thanks to Mercedes Source. Anyway, did valve adjustment, compression test (pressure max out close to 400). Changed injector nozzles to Bosios. Engine does not knock and is a bit smoother and responsive. Problem: pedal to the floor on highway and will not get past 75 mph?! Sometimes loss of power up hill. Have not changed the fuel lines from the tank. Is this the possible culprit? Thanks, RP.

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Diesel Engine Specific Aid

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Questions and Answers

Chassis Model Number

W126

honest diesel mechanic wanted Seattle

Hello, I am new to this forum, I have a 1993 MB diesel 350 straight six in my truck and would like contact information for a good mechanic here in the Seattle area. I want a mechanic that does not create problems, is very knowledgeable to all mercedes diesels, and does not mind working with and trouble shooting vehicles with SVO conversions. Evidently my truck is semi rare here in the states so said mechanic must be comfortable working on new things. My truck is a mid 90's G-wagen. Your referrences are appreciated. -Krashappy

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SVO/WVO
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Body and Interior Specific Aid

Replace/Rebuild Inj Pump?

I've recently replaced the nozzles with your kit for my 300CD non turbo. The car ran great for two days, then it quit in a big way. I've replaced the filters,lift pump, bled the air out of the system and can now only get her started with the fast idle turned up. Lots of smoke, I mean LOTS of smoke and when the temp starts to come up and I turn the idle down she dies. She'll restart with the idle turned back up, and still all the smoke. I'm getting ready to pull the Injection Pump to have it gone through, or is there something that I'm missing?

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Diesel Engine Specific Aid

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SVO/WVO

Chassis Model Number

W123

Diesel starting problems - cont.

My daughter has her 1985 300D at school in upstate NY, I'm in Missouri. She can't get her car started. I changed the pre-glow relay just befor she drove to NY, for the first time, in March. The initial problem was that the glow light never went off, the relay fixed that. A couple of weeks after she got to school she mentioned that the glow light stayed on after she started the car. Ignition on, light on, light off, start car, light back on always. This is different than the original problem when the light never went off during the pre-glow phase.

Chassis Model Number

W123

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Diesel Engine Specific Aid

84 300SD Battery Drain

Anyone know how to diagnose a battery drain in a 126- 1984 300SD? I just bought this car a few months back with a new battery. I guess I know why the guy who sold it to me put a new battery in right before he sold it...... The car starts when jumped. The battery is 3 months new. I tested it with a multimeter. After sitting for the night the battery is around 10. After its jumped the battery reads 13.5. The alternator is fine as far as I can tell. Never died on me while I was driving and the battery charges while the car is running.

Chassis Model Number

W126

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Body and Interior Specific Aid

87' 300TD NO A/C

Hello Everyone, I just bought a 87' 300TD. The a/c is not working. I'm a ASE certified master tech but I have no experience with Mercedes. The climate control seems to be working OK. THe fan speed changes with the temp settings, the air blows from the correct ducts when swithched which usually indicates no vacuum leaks or sevo problems. But the A/C compressor clutch does not engage. I checked the high and low pressure switches on the high side a/c line near the sight glass and they are not getting any power to them so jumping them will not help. I've read that the a/c control cutout relay could be bad, but I don't like throwing new parts at a problem without verifying with a test 1st. So can you tell me how to properly diagnos this ?? Thanks in advance for any help. Art D

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Body and Interior Specific Aid

Taxonomy upgrade extras

SVO/WVO
Questions and Answers

Chassis Model Number

W124

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