Wayne- anything is possible with time and money. However, since that bodystyle is available as the 500SL, already with the M119 engine, I would just sell your car, and get a 500SL.

TRUST ME on this.

Figure about $25K-30K to make the interface between a 1990 and 1998 car. If you can do this by yourself, and have about 4-6 months of 8hrs/day, 5-days/week, available go for it.

Did you know that the 400E and 500E have different front & rear subframes than the 300E? That's why I didn't stuff a 1992 M119 from a 500E into my wagon.

Did you know that the transmission is different between a 400E and 500E? The 500E/M119 tranny is WIDER.

Reason number 2, why I didn't stuff a M119.

You will also need upgraded brakes & suspension for the added weight and speed.

If the engine management is different between your 1990 300SL and the 1998 M119 engine, unless you have access to 1998 schematics or a MB dealer tech. with all the resources, don't do it.

If I had known all the complications from a 1988 W124 300TE to 1995 C36 engine & tranny, I wouldn't have done it. I would have purchased a 1995 W124 wagon and then done the transplant. Thank goodness I did the research, wiring interfance and the schematics.

Don't do it unless you have money & time to blow.

:-) neil