BENZ AID - COMMON QUESTIONS AND ANSWERS

Removing heater blower unit from a 190E sedan

I am interested in finding out info on how hard it is to remove an replace the heater blower unit from my 1988ish 190E sedan. I am pretty handy with the tools but want to know how much of a specialistjob it is and if it requires any special tools.

I have already replaced the switching unit and that temporarily fixed the problem. The unit then just packed up and it's getting pretty cold at the moment without it, not to mention a little dangerous having to demist the windscreen manually.

Any info or hints would be greatly appreciated.

cheers

Ozziedave

Forums

Body and Interior Specific Aid

Failure mode for blower motor 300cd

My cars blower was erratic (sometimes it would operate on high, sometimes it would operate on only medium, sometimes it would barely blow) and I thought that either my switch was malfunctioning or the fan motor was going out. It seemed that it might be the motor since even the defrost manual high speed setting was unpredictable. As of yesterday it has stopped all together. Is this the normal failure mode for fan motor or switch?

Chassis Model Number

W123

Forums

Body and Interior Specific Aid

83 300CD no start after fuel filter change

Help!

I just completed a diesel purge on my 1983 CD, I changed both fuel filters. With the secondary fuel filter nut loose, I used the manual fuel pump to remove the air. I have a feeling the pump is not working.... After 15-20 pumps with the manual hand pimp, I tightened the secondary nut. At this stage the primary filter was 1/4 full. I ran the engine, it ran for about 30-40 seconds then died. The primary fuel pump is full. I repeated the air purge procedure again... no success. the engine will not start.

Can you please advise next steps... advanced thanks!

Chassis Model Number

W123

Forums

Diesel Engine Specific Aid

1985 300D starting problem

My 1985 300D is becoming unreliable in starting. After warming the glow plugs turning the tumbler to "start" will not always engage the starter. Further, sometimes holding the tumbler in the "start" postion will have a noticeable delay in engaging the starter solenoid, if it happens at all. The battery is new and is fully charged. The starter was replaced just a few weeks ago with a new rebuilt Bosch. Is the problem in the tumbler, or is there some other relay that I don't know of?

Forums

Diesel Engine Specific Aid

1983 300d vacuum low ???

My 1983 300d has roughly 12-15 in/Hg of vacuum at idle. It fluctuates very very rapidly between 12 and 15 on the gauge. Does this mean that the check valve and the vacuum pump are bad? When you rev the engine up to 2000-2500 rpms, I get around 20-22 in/Hg and it still fluctuates very rapidly. I am checking the vacuum at the main servo line that runs to the brake booster. Any insight would be greatly appreciated bcs the price of these parts is defintely not cheap. Thanks for the help!!!!!!

GLIDEHM

Chassis Model Number

W123

Forums

Diesel Engine Specific Aid

1981 240d burning oil

Changed my valve guide seals using your kit about a week ago. Very good information provided in the book. Thanks.
I have not seen a reduction in oil consumption and still have a good bit of smoke at start up. My car is burning approx. 2 quarts per 300 miles. 211,000 on the clock. Runs great, seems to have full power and starts up every morning. What should be my next step in reducing the amount of oil being burned? (I have no leaks) I am using delo 400 15/40 or rotella 15/40.
Any advice would be appreciated... thank you.

Chassis Model Number

W123

Forums

Diesel Engine Specific Aid

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