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· Registered
2002 SLK 320
10 Posts
Discussion Starter · #1 ·
Hello all,

Try to figure out a logic tree on where to start on this code.

Air Injector fuse is okay.

My WIS disks are in storage so can't find a decent diagram
to locate relays etc to determine likely failure points

Any suggestions from the experienced one's?

Thanks in advance


· Registered
1998 SLK 230
19 Posts
Just fixed this on mine. Took out the switchover valve and cleaned with carb cleaner, also actuated it with a hand vacuum pump. Replaced the check valve that is down stream of it, it was rusted up and letting air through both ways, blow on it to test.
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