PeachParts Mercedes-Benz Forum - View Single Post

Jeremy5848 · #6 03-13-2015, 06:35 PM

The 1997 E300D has switches on the two intake manifold flaps (one in the crossover, one in the manifold) that tell EDS whether the flaps are actually opening or not. If they don't send the signals, a code is set. It is possible that the cable subcontractor added the extra plug (there actually should be two) whether needed or not. Also possible that the cable was replaced sometime during the life of the car; the replacement cables may have been meant for 1996-97 and the flap connector was ignored if the engine didn't have flap switches.

I've never seen a flap with a switch as the 1997 models are supposed to have. Anyone with a 1997 E300D willing to post a picture showing the flap, its actuator, and an electrical switch would earn my gratitude. Interestingly, EPC lists the same part number for the flaps for both 1996 and 1997. I suppose it reduces the number of parts in inventory.

Personally, I'd like to have flap switches in my '95 E300D, not for EDS but to operate the LEDs I've added to the car's tach, which illuminate as each flap changes state. Currently, the LEDs illuminate when the electrical signals are sent to the vacuum solenoids but that doesn't mean that the flap actually moves (could have a solenoid or vacuum failure). Here's a link to a short video showing the LEDs lighting up as the RPMs climb and the flaps open:

OM606 Intake Flap Operation Video by Jeremy5848 | Photobucket

Jeremy