2003 ML 320: Engine:112942 31 305548, Transmission: 722662 03 807606, FrontAxelAL431020714752162233
Pictured here is an area above and behind the brake fluid. There is a black plastic know with prominent ridges that make it look like its so you can grip it and turn it. It somehow goes to the accelerator cable. Do you know what it is called and what the possible adjustment is for? This is attached on the firewall directly in front of the driver (left side) North American model.
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