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

E300D intermittent hesitation/power loss

'98 300 E TD. Engine hesitation occurs intermittently. Can be very frustrating, leading to total loss of power. Happens at any speed and any RPM, but only happens under load. Burns perfectly clean & smooth, but hesitation is a big problem. Comes & goes w/o reason - might hesitate badly for 5 miles or for 1,000. Might happen every drive & repeatedly for 2 or 3 weeks, and then might run perfectly for next 2,000 miles. WTF?! Have checked for codes, good fuel flow, mass air, etc. Is confounding to all mechanics I've brought it to.

Chassis Model Number

W201

Forums

Body and Interior Specific Aid

Cold air filter available, possible oil blow by fix?

Hello, I have an old engine that is blowing by oil and making my air cleaner very oily, so in lieu of this I have seen cold air systems on 300tds ,& I was wondering if this would 'fix' my dielema of having to replace the air filter, because it is a direct system, seperating the air and oil. Am I understanding this right, I have only seen pictures so ... just wondering...any insight out there... Thanks ! James

Chassis Model Number

W123

Forums

Diesel Engine Specific Aid

1983 Mercedes 300D-T not starting

My car will no longer start. For a while when I turned the ignition key, I had to wait between 2-5 secs for the engine to start. Now, the starter is turning over, but other than that--nothing. The glow plugs seem to be good (I tested them at the relay without removing); the battery reads 12.3V (I know this is on the low side, but even with the car jumped by my other working vehicle, the car still won't start); and I just changed the fuel filter (I've been running biodiesel for 11 months and have changed the fuel filter 4 times since then) thinking this might be the issue. Still, nothing....

Forums

Diesel Engine Specific Aid

Taxonomy upgrade extras

Questions and Answers

Chassis Model Number

W123

Diagnosing a worn out diesel

Hello, I have excessive oil blow by comming out the breather tube, so much so , that my air filter is about 35% covered in oil. I also have a distinct metal knowcking noise at idle speeds, seems to be comming from the front of engine but cant be sure. I read your " why does my diesel leak" manual and it said something about a cam going bad...how do you check this? I have done my valves( also with your cool tools- excellent!) and forgot to check the cam, and Im not sure what to look for. Also how do you check the timing chain? Thanks in advance James

Chassis Model Number

W123

Forums

Diesel Engine Specific Aid

87 300TDT Turbo spool up LOUD whine, engine runs but sluggish.

I have a 1987 300TDT with 119,000 original miles bought a year ago from the original owner. Yesterday while accelerating abruptly in traffic I heard a loud wind up sound (like the turbo was out of control), a loud "clink" sound from under the hood, and a puff of grey smoke followed- all within a 2 second range. The rest of the way home (about 8 miles) there was a lack of power and that same wind up sound- only in the range that the turbo would normally kick in: My question is of course... What is it and how to fix it? this is the 603 Diesel 3.0L 6cyl.

Forums

Diesel Engine Specific Aid

Taxonomy upgrade extras

Questions and Answers

Chassis Model Number

W124

Pages