W205 AMG exhaust flap 2

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Dec 29, 2022 | 06:47 PM

Rod Storer

Thread Starter

Newbie

Joined: Feb 2020

Posts: 1

Likes: 0

From: Melbourne

AMG C 63 S. 2015

W205 AMG exhaust flap 2

I have a code reading of P1 40471 and P1 40472
Exhaust flap 2 malfunction, actuator not open
actuator not close Exhaust flap2.
how can I identify which is exhaust flap 2
is exhaust flap 2 H pipe or rear mufflers ..

Dec 31, 2022 | 02:59 PM

MaxVO2

Senior Member

Joined: Dec 2021

Posts: 268

Likes: 135

From: Maryland

2018 C63s

Quote:

Originally Posted by Rod Storer

****Dunno which one is exhaust flap 2 but when I replaced my faulty actuator in the mufflers, I could see the flap was misaligned on the broken side just looking through the muffler from the back. The spring broke on the actuator and I bought a new one made by Audi that was exactly the same as the Benz part but less than 1/2 the cost. Ford also has the same actuator on some of their vehicles. Sometimes the Ford is cheaper than the Audi, or vice-versa - both of those are a LOT cheaper than the Benz one though, at least when I purchased my replacement..

The one at the H-pipe is identical to the others, but you can deduce that it is the broken one if the flaps on the mufflers open and close normally when they are energized. Easy fix. Oh. I also lubed the rod/tab thing thing with a penetrating lube on the muffler as it was noticeably more resistance to spin it than the other side - dunno how long that would last, but it did seem to free it up and make it a lot easier to spin so presumably less force on the actuator...

Good luck