Thanks guys, I'll try that and post here the results shortly after

I am not there yet. That depends on his report back. I do these post from the bat. feed foward. It is a diagnostic step sequence I use b/c many here are not Techs. If the light go Out , we have a connection problem cause by load. That is very possible with his condition, specially after sitting.
Both fuses 5 and 6 should also be spun in there holders , but iIdo not want to go there until we see where we stand with power feed.

Have you tried cranking th engine with the shifter in neutral?
Is the car equipped with an aftermarket alarm? I've seen the starter interupt relays fail.
Good luck, Mike

I have tried to crank it with the shifter in neutral yes, no difference. It has no aftermarket alarm either, just the stock MB security system.

unless someone already mentioned, try arming and disarming the alarm again- I've seen that cause problems before too, try from different tumbler positions as well.

__________________


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Just remembered this as well. The key is not unlocking the doors manually, but when using the remote to lock / unlock it's fine. Maybe this has something to do with it ?

I just did this and the headlamps stay on and do not dim at all.

If you did not get any dimming of the lamps than you are not making connection to the starter,at some place in the system you are not getting current flow,I dont know enough about your car but if you have an alarm disability and the key is not working I would look in that area. j-n-t

OK
B/C the lights stayed On and no crank means that there is no starter circuit
being energized, thus you have passed the load/bad connection test .

Two more test.

First Test
With left hand , hold key over to start position while moving shifter on both sides of the N position. If it cranks, the problem is in the NSS. [ Neutral Saftey Switch]

Second Test
Spin the fuses for the K38 relay [ alarm interlock] I don't have that fuse chart handy, but I think it is 5 and 6 or 6 and 7. Spin those fuses in their sockets. If there is a poor connection at the fuse, the relay is not getting power and that would interupt the starter circuit.

Arthur,

I appreciate the help very much.

I just did both of these tests. I hope I did them right

First Test: I did this and still no crank.

Second test: I spun both 5 and 6 and also 6 and 7. What am I looking for here ? Still no crank. I am assuming spinning the fuses all the way around correct ?

The spinning of the fuses is to clean the connections at the tip of the fuses ...Benz fuses are notorious for making bad connections at the connection ends, specially after sitting for long periods. You should do them all.

If there is a poor connection there, the inerlock relay gets no power and on the factory alarmed systems, the relay has to have power when the alarm is OFF. It is in the series chain of parts for the starter circuit. The starter circuit goes from Bat to ignition sw, to NSS switch, to alarm interlock, to starter solinoid. Any break in this series results in a No Crank condition.
I do not have the 129 schematic here at the moment , so I am unsure of which fuse feeds that circuit. See if your chart has that info. Might be referred to as ATA

I spun every fuse on the car, and still no difference

Any other suggestions ?

Anyone ?

It sounds like the starter to me. Its a common problem for cars that have been sitting for a while. Try getting a testlight and checking if the starter is getting power when you turn the key, if it does then I would put in a starter.

I have tried everything you can think of to get this car started and still no luck.

I have a hunch is has something to do with the key. I have the master key for the car and the car will not lock / unlock manually. It simply will not turn the tumblers.

When I use the remote to lock / unlock it's works great. Also the MB anti theft system will only work one out of 5 times or so. ( arm system and open door and most of the time the siren will not go off )

What can be causing this problem ? Do I need a new key ? Any suggestions would be appreciated. I cannot tow this vehicle to the dealer due to the ride height!

Thanks in advance.