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Old 07-07-2003, 01:12 PM
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Join Date: Apr 2001
Posts: 167
Mystery to me

The automobile in question is '87 300 TD.
It has been raining here for a month.
So I load about 250 lb. in the back of the car and am looking forward to seeing how thwe self leveling is functioning.
Start the car, drive a couple of miles, look at the guages and notice that the anti lock light is lit. A minute later I hear/feel and little click and the tack stops functioning and th AC stops putting out cold air.

Check fuses they all appear OK.
Changed 1 I think it was 7.

Park the car.

Next day same story. Same symptoms.

Park the car.

2 or 3 days later no symptoms.

Take it to my tech, he looks at the fuses says I have to leave it. Which I can't do that day.

A week later it rains again, and it all happens again.

Next day no problem. No symptoms.

What on Gods green earth is going on?

Thanks in advance.

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Old 07-07-2003, 01:25 PM
Posts: n/a
just a suggestion - check and clean your ground connections - sounds like a bad ground. If it is affected by moisture - it most likely is a connection. When I say grounds - I don't only mean at the battery - but anywhere a wire is attached to the chassis or engine block. Look for rusty or corroded connections.
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Old 07-07-2003, 05:52 PM
Join Date: Mar 2000
Location: Gainesville FL
Posts: 6,844
If I recall the EGR transducer makes the engine speed signal. It is also my impression that it gets its power from the overvoltage protection relay!
Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician
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Old 08-25-2003, 12:13 PM
Registered User
Join Date: Apr 2001
Posts: 167
Steve wins the cigar

OVP relay was the culpret.
Thanks to alll.
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