I have a 1973 450 SL w/D Jetronic, it seems to me that the price for the OEM ECU or MPS for that matter, you could buy an aftermarket engine management system with a new manifold pressure sensor but utilizing all the other sensors and a programmable ECU. My question is has anyone on this board done this, and how hard was it?

Here a a couple of links to sites I found.......
www.bgsoflex.com/megasquirt.html
www.motec.com.au/products.htm
www.ptrsds.com/

Chaosmosis

1973
450SL
107.044 :

Try the Performance Paddock Forum.
Some real hardcore hotrodders over there.

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2007 C 230 Sport.