Notes on smooth engine running test - AH07.00-P-3004-02WA

ENGINE 104.941 as of 8/1/96, 111.944 as of 8/1/96, 112.910/920, 113.944 in MODEL 202

ENGINE 111.975 in MODEL 202.085

ENGINE 111.944/975, 112.940, 113.943 in MODEL 208

ENGINE 112.942, 113.942 in MODEL 163

ENGINE 104.943/991 as of 6/1/96, 112.923/943, 113.961, 119.982, 120.983 in MODEL 129

ENGINE 111.945 as of 6/1/98 in MODEL 208.335

ENGINE 104.944/994 as of 6/1/96, 119.980/981, 120.982 in MODEL 140

ENGINE 111.974 in MODEL 202 with CODE 491 (US version)

ENGINE 111.975 as of 8/1/96 in MODEL 202.024

ENGINE 111.943/973, 111.946111.946 as of 6/1/98 in MODEL 170

ENGINE 111.945 in MODEL 208.435

ENGINE 112.922/944, 113.941/960 in MODEL 220

ENGINE 111.947, 112.911/921/941, 113.940/980, 119.985 in MODEL 210

ENGINE 104.995 as of 6/1/96 in MODEL 210 with CODE 491 (US version) with CODE 498 (Japanese version)

The smooth engine operation test must be carried out when vehicle stationary at idle speed. If the smooth operation value is greater than the switch-off threshold, faults are saved in the fault memory and the fault counter is simultaneously incremented. After rectifying the fault the fault memory has to be cleared.

Fig 1: Identifying Smooth Engine Operation Pass Image

Courtesy of MERCEDES-BENZ USA

Fig 2: Identifying Smooth Engine Operation Fault Profile

Courtesy of MERCEDES-BENZ USA

Smooth engine operation pass image

Shown on engine 112, 1/s2=speed difference for individual cylinders

Smooth engine operation fault profile

Shown on engine 112, fault on cylinder 4