Hi

My 1970 W108 280SE M130 is only running on 5 cylinder
I just changed the spark plugs, the old one's were bosch W7DC. bought new denso that should be the same as W7DC.
After i changed the spark plugs the engine actually ran fine, but today (200 km's later) it's running on 5 cylinders again
I have checked the ohm reading on both ends, and they are both around 1 ohm.
Any advice on where to begin ?

Do i need a new coil, or should i look for something like this electronic ignition from 123:

http://www.123ignition.nl/id/25.html

Or do i need to adjust the valve timing ?



Regards

Mads