I would like some information on this car. I need to know if my fuel pressure gage will fit this car? I use it on Gm cars, but was not sure if Mercedes use the same style port. Also what is the correct fuel pressure in psi? If I want to check the pf relay, is it located behind the battery? There is a black box next to a computer and a relay behind that. I asume the black box is the fp relay. What is the other relay behind the black box? Is there a way to check the ovp without just changing it? I have read some post that state they can take the ovp fuse out and the car will start. Is this true? I don't want to just start changing out parts until I find the problem. Too expensive.
Thanks JohnT

FP specs:

Normal Run 3.2-3.6 bar
With vac line to pressure regulator disconnected 3.7-4.2 bar
After 1/2 hour stand/off No less than 2.5 bar
[Bar = 14.5psi]

The fitting is on the fuel rail and is the same thread as R12 fittings. Don't know what your GM uses.
Pevious OVP info post is correct.

1993 300E (3.2) and 1993 300E 2.8's use the same engine management system as 1994-1995 E320's.

It is the 300CE coupes with the "early style" 3.0 liter M104 engine that used the old KE engine management system. I think it was 1990-1992 300CE's.

__________________
Paul S.

2001 E430, Bourdeaux Red, Oyster interior.
79,200 miles.

1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".

'93 s w/104 eng without full electronic FI were S class....