i have a 1984 190-D, today the tack stoped working and at the same time the A/C compressor stoped also. I checked all the fuses and they are OK. I was wondering what the problem might be? could it be the RPM Sensor on the engine? how do i trouble shoot the problem? this is really weird. The blower is still running so i know the fuse that controls the climate control is ok plus i checked it also.

HELP a HOT MB owner in South Louisiana.!!!!!!

__________________
1984 190D 2.2 (the real one not the 2.0 bored out)
1994 Saturn SL1
1994 Jeep Cherokee 4.0

Fix the tach!

The tach signal is processed by the EGR transducer I think. Without a engine speed signal the compressor will shut-off. The OVP relay gets real involved here by powering the EGR transducer.

__________________
Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician

SAme thing happened to my 300sd after I changed the starter, Turns out I left a ground wire loose on the battery. Check it out even if you did nothing tp the car.

SAme thing happened to my 300sd after I changed the starter, Turns out I left a ground wire loose on the battery. Check it out even if you did nothing tp the car.

Hey steve, thanks for the info but whats an EGR transducer and a OVP relay, this is on a Diesel powered engine.

__________________
1984 190D 2.2 (the real one not the 2.0 bored out)
1994 Saturn SL1
1994 Jeep Cherokee 4.0

Don't matter diesel, does matter speed sensing.

If you have a Klima relay then you have engine speed sensing. If you have a tach then there is speed signal conversion, usually done by the EGR transducer on diesels (done by ignition controller on gas). I'm not sure how much electronics are on an 84 190D but if it has a klima it wants engine speed.

__________________
Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician

2 to 1 is my guess.
I am not a gambler but I would wager on this.