Engine	104.995
Models	210.055
HFM-SFI system designation	4.1
Engine, check, adjust (07-1100) 12) Page 1 Engine oil temperature ° C ECT ° C approx. Engine speed (selector lever in P/N position) rpm Injection duration ms Air mass kg/h Battery voltage V O2S 1 voltage mV O2S 1 heater HHT display O2S 2 voltage mV O2S 2 heater HHT display WOT (accelerator pedal in WOT) HHT display Fuel shut-off HHT display Self adaptation HHT display Self adaptation idle air kg/h Self adaptation lower range of part load Factor Ignition timing °CKA Throttle valve angle ° MAF sensor voltage (increasing rpm, increasing voltage) V On-off ratio % Purge valve on-off ratio %	>60 >80 600 - 800 2.5 - 3.8 15 - 18 10 -200 to +1000 10) ON -200 to +1000 10) ON ON OFF OFF/ON 13) 0±2 4) 0.85 - 1.15 5) 6 - 10 1) 0.3 - 1.8 0.8 - 1.3 0±10 2) 10±5

1) The ignition timing is also used for idle speed stabilization. In extreme cases the timing can briefly vary by ±10° from specification. 2) In case of complaint, on-off ratio must be measured at idle speed and at 2500 rpm with purge line to engine disconnected and plugged. 4) Base setting idle, 0.0 kg/h (Bosch) or 0.0% (VDO), mixture tendency rich , < 0.0 kg/h or 0.0%, mixture tendency lean > 0.0 kg/h or 0.0%. 5) Base setting part load = 1.0, mixture tendency rich <1.0 mixture tendency lean > 1.0. 10) Oscillates around 300mV after 2 minutes at idle. 12) Time Guide operation no. and/or SMS job no. 13) HHT display ON if self adaptation is required.

Engine	104.995
Models	210.055
HFM-SFI system designation	4.1
Engine, check, adjust (07-1100) 12) Page 2 Camshaft adjustment solenoid <2000 rpm HHT display Camshaft adjustment solenoid >2000 rpm HHT display Camshaft adjustment solenoid >4000 rpm HHT display Intake manifold switchover valve CTP HHT display Intake manifold switchover valve >4000 rpm HHT display DTC counter ignition cylinders 1 - 6 Count DTC counter ignition coil T1/1, cylinders 2/5 Count DTC counter ignition coil T1/2, cylinders 3/4 Count DTC counter ignition coil T1/3, cylinders 1/6 Count Spark duration ignition coil T1/1, cylinders 2/5 ms Spark duration ignition coil T1/2, cylinders 3/4 ms Spark duration ignition coil T1/3, cylinders 1/6 ms Spark voltage ignition coil T1/1, cylinders 2/5 11) V Spark voltage ignition coil T1/2, cylinders 3/4 11) V Spark voltage ignition coil T1/3, cylinders 1/6 11) V Knock control approved HHT display Knock ignition angle, cylinders 1 - 6 °CKA	OFF ON OFF OFF ON 0 0 0 0 1.5 - 1.9 1.5 - 1.9 1.5 - 1.9 34 - 37 34 - 37 34 - 37 OFF/ON 14) 0

11) Display only on Bosch control modules. 12) Time Guide operation no. and/or SMS job no. 14) HHT display ON if knock control is required.

Engine	104.995
Models	210.055
HFM-SFI system designation	4.1
Cold start (07-2321) 12) Starter signal circuit 50, during cranking HHT display Battery voltage V ECT at starting ° C ECT ° C After start enrichment < 70° C maximum of 20 seconds HHT display IAT ° C CTP contact (accelerator pedal not depressed) HHT display	ON 10 7) 7) ON 7) ON

7) Temperature at which complaint occurs. 12) Time Guide operation no. and/or SMS job no.

Engine	104.995
Models	210.055
HFM-SFI system designation	4.1
Warmup (07-2023) 12) Transmission selector lever position Warmup speed (raised idle speed) 15) rpm Warmup speed (raised idle speed) temperature dependent ECT <0° C rpm ECT 0 - 30° C rpm ECT 30 - 40° C rpm ECT >40° C rpm Warmup HHT display AIR pump after >20 seconds HHT display A/C compressor (not engaged) HHT display IAT ° C CTP contact (accelerator pedal not depressed) HHT display Catalytic converter heating, idle HHT display	P/N D 1150±100 1000±50 950±50 850±50 750±50 650±50 700±50 600±50 <80° C ON >80° C OFF OFF OFF >20 ON ON 15)

12) Time Guide operation no. and/or SMS job no. 15) Raised idle speed if ECT < =20 oC for approx. 20 seconds after start.

Engine	104.995
Models	210.055
HFM-SFI system designation	4.1
Engine performance 7) Page 1 Engine speed rpm Ignition timing with premium unleaded gasoline (91 posted/95 RON) °CKA Injection duration ms Air mass kg/h WOT recognition HHT display Output, 4-speed AT, TR 3 hp Exhaust gas back pressure mbar Camshaft timing adjustment <2000 rpm HHT display Camshaft timing adjustment >2000 rpm HHT display Camshaft timing adjustment >4000 rpm HHT display Intake manifold switchover valve at CTP HHT display Intake manifold switchover valve at >4000 rpm HHT display VSS mph (km/h) Deceleration shut-off >2100 rpm HHT display Transmission overload protection switch, 4-speed AT V Altitude mbar CC operation HHT display	5300 20 - 24 14 - 17 510 - 540 ON 162 <300 OFF ON OFF OFF ON > 62 (100) OFF 3 - 5 refer to barometer OFF

7) These are minimum performance values. Do not exceed speed of 80 mph. It is not possible to simulate coolant and intake air temperature as these are determined by the HFM-SFI system. Provide adequate cooling using external fan when checking wide open throttle performance.

Engine	104.941
Models	202.028 [C 36 AMG]
HFM-SFI system designation	3.4
Engine performance 7) Page 2 DTC counter ignition cylinders 1 - 6 Count DTC counter ignition coil T1/1, cylinders 2/5 Count DTC counter ignition coil T1/2, cylinders 3/4 Count DTC counter ignition coil T1/3, cylinders 1/6 Count Spark duration ignition coil T1/1, cylinders 2/5 ms Spark duration ignition coil T1/2, cylinders 3/4 ms Spark duration ignition coil T1/3, cylinders 1/6 ms Spark voltage ignition coil T1/1, cylinders 2/5 11) V Spark voltage ignition coil T1/2, cylinders 3/4 11) V Spark voltage ignition coil T1/3, cylinders 1/6 11) V Knock control approved HHT display Knock ignition angle, cylinders 1 - 6 °CKA	0 0 0 0 1.5 - 1.9 1.5 - 1.9 1.5 - 1.9 34 - 37 34 - 37 34 - 37 OFF/ON 14) 0

7) These are minimum performance values. Do not exceed speed of 80 mph. It is not possible to simulate coolant and intake air temperature as these are determined by the HFM-SFI system. Provide adequate cooling using external fan when checking wide open throttle performance. 11) Display only on Bosch control modules. 14) HHT display ON if knock control is required.

Engine	104.995
Models	210.055
HFM-SFI system designation	4.1
On-off ratio Idle speed rpm Engine speed rpm On-off ratio at WOT and TR 3 % On-off ratio at upper partial load and TR "D", 75 mph (120 km/h), 32 hp (24 kW) % On-off ratio at upper partial load and TR "D", 31 mph (50 km/h), 9 hp (7 kW) % Exhaust gas back pressure mbar	600 - 800 3500 0 ± 10 constant ±10 oscillates ±10 oscillates < 300