1990 350 sdl
The key will activate the starter motor and srs light but nothing else in the mornings.
If I turn the key back and forth about 20 times or more all the idiot lights come on and the glow plugs get activated and everything works fine for the rest of the day.
New battery, charging system checks okay.
All 6 glowplugs okay.
Redid the ground wires from battery to chassis and the strap under the big splash pan.
I had door lock malfunction at the same time and that confused me. The locks are now functioning.
I have ordered the non tumbler portion of the switch but I am pulling on straws as I really don't know what the problem part is.

 

All that I can say is that the ignition switches in mid eighties to mid nineties benzs do ware out and need replacement. It's happened on two of my benzs. Remember, there is also a vacuum switch incorporated with the ignition switch on diesel cars. Access is tight for the 124 and 201 cars, not sure how difficult on your 126?

 

I have a 1990 350 SDL and in the morning it wont start up.....before (bought 1 month ago) would start on the first crank (after glow plug light went off), now I have to crank and crank and crank and 10 or so minutes after she will start...is it my plugs, evrything electrical is working fine (except rear pass. left window and my lumbar controls)..please help so I know what to tell the mech to look for..... thanks people..DIESEL 4EVER

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