Cold (Fast) Idle Rpm
- Adjust fast idle by setting angle of primary throttle valve with choke fully closed. Position fast idle cam on first step (second step on GLC Wagon and 626 models.)
- Clearance between primary throttle valve and throttle bore should be 0.026" (.67 mm) on GLC models; 0.031" (.78 mm) on GLC Wagon models; 0.018 - 0.030" (.45-.75 mm) on 626 models; and 0.05 - 0.06" (1.3-1.5 mm) on B2000 models. Adjust angle to specifications by turning adjusting screw.