PeachParts Mercedes-Benz Forum - View Single Post - Does the "coin trick" work on 1996 EGR's?

Jeremy5848 · #3 03-25-2013, 11:14 AM

Assuming you mean a 1996 Mercedes E300 diesel, you can block the exhaust flow at any point and the system won't know the difference. Leave the EGR valve and its wiring intact; the valve will open, the wires will report to the electronics and the system will be happy. The 1996 system is not very sophisticated -- it doesn't know whether anything is actually flowing through the EGR valve. Most of us block EGR by replacing the existing sheet-metal gasket between the valve and the crossover pipe with a gasket cut from scrap and missing the center hole. Keep the original gasket in its place so you don't lose it, in case you ever have to go for an inspection.

Once that is done and you're having no problems, remove the intake manifold and clean out all the carbon crud. The engine will be happy. While you're in there, remove the vacuum-operated flap that's in the pipe next to the EGR valve. It's located between the EGR valve and the air cleaner. All it does is to restrict air flow and create a partial vacuum in the intake manifold so more exhaust can be sucked in. Remove two Philips screws and the flap inside the pipe can be removed. Leave the rest of the parts in place. If you have to get the car inspected, replace the flap and take the block out of the EGR path and you're ready.

Jeremy