Has anyone found a suitable replacement coil drive transistor for the ignition modules in the w107 SL's? The Bosch part number for the module is 0 227 100 023.

The original transistor seems to be a high powered darlington of sort with a Bosch lable on it, which would be impossible to get hold of. I have tried an MJ10012 but would have to limit the base current as it was driven to hard and died.

Limiting the drive may also effect the feedback to IC1 and effect the pulse timming, so I would prefer to find a transistor which could handle the base current supplied by IC1.

If anyone has any ideas in this or have found a suitable replacement for both the transistor and IC1 if it ever goes, please let us know.

Regards Damian