I have a 1995 mercedes E300 diesel, the tac does not work or the cruise. When you crank the car the first time of the day it will crank right up, but then when you cut it off it doesn't matter if it has been 5 minutes or hours, it will not start back it will turn over but not crank unless you switch the key on and back off and back on three times, then it will crank right up. What do I need to do to fix this Does anyone have any suggestions on my cranking problem

 

I am sorry--I may be way off base here--but I don't know if this has a crank position sensor and/or crank speed sensor (some cars in this era had both). You may want to test one/both for an AC voltage signal. If I have time I'll check the wiring diagrams. Check with your local library to see if they have any electronic repair information (many are going away from books and to the subscriptions). Best is AllData, next is Chiltons and I think the bottom of th pile is Mitchells. AllData will have good wiring diagrams and Chiltons might.
Lawrie

 

https://mbworld.org/forums/5135156-post6.html

 

Is the check engine light on? Have you pulled any codes?

 

No the check engine light is not on and I have not pulled any codes because I do not know where the test port is. My scanner only goes from 96 and newer

 

Floobydust,
Thank you for the schooling and the info contained in the link. I really appreciate it,
Lawrie

 

First, There is no 'Check Engine' light on a 95 E300 (Hence why it's awsome for moding and easy to disable the EGR system) Plus a check engine light 90% of the time is just for emissions only (hence the yellow, not red light)

With that said, No your OBDII scanner isn't compatible with this car. Hence, there's no port to plug into. HOWEVER, there IS an OBDI scanner built in to every 95 E300. It's in the battery bay, opposite of the firewall. It uses a series of 'jump wires'/ volt meter to give you codes. though I doubt it will give you any codes anyway with the senerio your describing.

Once it fires up, does it stumble a bit? ... like a bunch of 'clacking' i guess is easiest to describe it. Could be any number of things.. off the top of my head (keeping in mind I haven't the slightest idea of the service history);

-Fuel supply issue. When's the last time you changed the spin on filter? and the PRIMARY fuel filter? Injector return lines leaking? Hard clear fuel lines cracked?

- Next would be vacuum. I'd get the Mityvac out and start testing vacuum to the ignition switch. The brown line the attaches to the big black brake booster vacuum line on the DS. I know has to do with shut off... Maybe you have a sticky shut-off valve or whatever its called (slipped my mind)

As for the issue with the tach and cruise being Non-op. Neither of the 3 symptoms you have correlate with each other based on what you described. tach amp's are known to die and Definitely the Cruise Control units crappin out is well known for Mercedes (I've yet to own one where the cruise worked!) I'm not sure, though I highly doubt it that, but the did Cruise work before the Tach. died? Maybe the Tach amp and CCU are correlated but, like I said, highly doubt.

The third with hard starting is either a fuel supply issue or, a vacuum issue.