No spark on m116 d-jet

Hi Mads,

I was away on a trip so here is my late answer. You already identified your broken pre-resistor. To check the rest, please go to menu 107 SL workshop manual - repair instructions . engine combustion . M116/M117 D-Jetronic and look at chapter 07.5-120 Testing breaker controlled transitorized ignition . Look at section standard Standard switchgear (Si). You have to turn your engine to have breaker in open and in closed position.

WARNING! If you leave your ignition ON for too long while breaker is closed, you will destroy either resistors or ignition module or coil or all of it as it will mean that a continuous maximum current will flow through these components while they normally only have pulsed current.

Hello,

only briefly: It is chapter 07.5-520.

Recardo

Thanks for all your help guys, really appreciate it.

Small update
I just ordered a new resistor and a new coil (just to be sure).

The TSZ Unit has part number 0 227 051 012, and it has a 4 fixed wires, green/yellow, Red, Black and brown.
In the cast it says 15, 16, 7

i forund the section in the manual
www.startekinfo.com/StarTek/outside/1188.../M117_45/075-519.pdf

Will try to test when I get the Resistor.

Is there a way I can test the TSZ with a multimeter, now that I have it out of the car? Or do I have to wait until I can assemble all the components?

Regards

Mads

Hi Mads,

a W116 should have a 0 227 051 014 or 0 227 051 024 ignition module. What you have is a wheel type module for R/C 107 SL. Either you swap to standard type or you have to read section about wheel type unit. It is however strange to mount that in W116. In R/C 107 it is mounted in wheel housing and gets cooled there. A 012 is potted and cannot be repaired. So keep your fingers crossed that it is not broken.

It is a 1971 350sl. Not a w116.

Hi Mads,

but then it is very confusing if you put a W116 instead in your profile. I recommend that you change that.