Since the k40 supplies power to several of the sensors, I'd take a close look at it and either re-solder suspect connectors or just replace it all-together.

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-Evan


Benz Fleet:
1968 UNIMOG 404.114
1998 E300
2008 E63


Non-Benz Fleet:
1992 Aerostar
1993 MR2
2000 F250

If I were you, I would start with a new K-40 relay. As for the sensors, there is a black sensor that is attached to a small vacuum hose coming off the intake manifold. There is the Throttle Position Sensor. Then, there are two other vacuum sensors that are attached to the air intake filter box. They are both the same part number, one controls the egr valve, the other the resonance flaps. I am sure there are more that I haven't mentioned, but my first course of action after eliminating the K-40 relay would be to disconnect the electrical connector to each sensor, and spray it with an electronic contact cleaner, which can be picked up at Radio Shack. I had an issue this past summer where I got a code for the Throttle Position Sensor.......no driving issues, but still a code. Checked all the vacuum lines, no problems, then went on to clean all the electrical connectors to the various sensors, and presto.....code was reset, and has not returned. This route is not expensive, but does take a little time and effort to complete. Wish you luck in finding an answer to your problem.

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96 E300d

Aside from the k40, I think these cars are not designed to accelerate when you have foot on brake. Check the brake light switch. If its on it might be causing your acceleration issue. Whereas in neutral it doesnt come into play. Just a thought

__________________
Dennis
2006 E320 CDI Black/Black Leather. Nav, HTD Seats HK stereo 32000 miles.
2000 VW Passat 1.8t 300,000 miles as of Dec 09, 2009 original owner
1997 E300d Silver 300,000 miles As of Jan 05, 2010
3rd owner SOLD

i think since it happens with increased temperature that it would be the k40, because it malfunctions if it overheats. if you have a friend that has the same car try his k40 before buying a new k40. They are not that expensive anyways

new update , when car warm, in drive car will move slowly then build up momemtum, If put car in neutral and hit gar car revs slowly , then builds up. seems to not want to rev off line whether in gear or not, so not trans problem. Any ideas?, again all filters new no fuel or air leaks, have to pull injectors and have tested. Thnaks