Quote:
Originally Posted by oldiesel
Bsmuwk
cant send a picture till tomorrow,but the egr has the Mercedes star and the following numbers A0021402960 981166 7.21949.04 Peirburg (not too sure about the spelling )
also has new pipe connecting egr to the manifold. Don
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You have the right one then, don't worry about the picture. If it IS new, seems like they've tried fixing this problem before you bought it. I would definitely start off doing an entire system cleaning and a vacuum line refresh to make sure everything is in order. Give yourself a solid baseline before proceeding.
I attached a vacuum diagram for the car in the post. There's a line running T'ing off from the brake booster area that runs across the engine bay to feed the EGR/Resonance flap switchover valves.
When folks don't know what they're doing and try doing an EGR delete on these motors, they oftentimes start removing or pinching off vacuum lines - worth a shot to test everything out. Switchover valve testing is easy, just power/ground.