Benz CIS To EFI Conversion (diy ECU “Brain Box”)

How to start? Well I did the most logical thing grin and sold my dependable honda for a Benz 10 years older..C124 1989 coupe..the drive was pleasantly different..power was up a lil….my honda was manual, no slouch when kept in the VTECH rev range. The problem started 2 weeks later I knew I was going to have some troubles but boy was I unprepared for the headache called Bosch continuous injection system.

I learnt fast the in and out then came to the realization that it was a loosing battle, parts were scarce and often in bad state.

Option 1 junk the motor buy a c class m111 4 cylinder engine
And convert.

Option 2 convert the m103 6 cylinder to EFI

I chose option 2 because it’s harder….really its because I already have one( lowest budget possible), and the need to experiment ….and I love the howl of the 6 when revved hard!!!!

After so much research, head scratching, parts scrouging