Mercedes-Benz OM 471 Introduction Into Service Manual page 219

System components
4 Diesel oxidation catalytic converter
(DOC)
5 Diesel particulate filter (DPF)
A70 Exhaust aftertreatment unit inlet
NOx sensor control unit
A70 b1 Exhaust aftertreatment unit inlet
NOx sensor
B37 Exhaust pressure sensor
downstream of diesel oxidation
catalytic converter
B38 Exhaust pressure sensor
downstream of diesel particulate
filter
B67 Exhaust temperature sensor
upstream of diesel oxidation
catalytic converter
B68 Exhaust temperature sensor
downstream of upper diesel
oxidation catalytic converter
B69 Exhaust temperature sensor
downstream of lower diesel
oxidation catalytic converter
B70 Exhaust temperature sensor
downstream of diesel particulate
filter
Location of sensors
1 Exhaust aftertreatment unit:
2 Ammonia blocking catalytic
converter
3 SCR catalytic converter
4 Diesel oxidation catalytic converter
(DOC)
5 Diesel particulate filter (DPF)
A57 b1 Exhaust aftertreatment unit outlet
NOx sensor
A67 AdBlue" metering device
A70 b1 Exhaust aftertreatment unit inlet
NOx sensor control unit
B37 Exhaust pressure sensor
downstream of diesel oxidation
catalytic converter
B38 Exhaust pressure sensor
downstream of diesel particulate
filter
B67 Exhaust temperature sensor
upstream of diesel oxidation
catalytic converter
216
B68 Exhaust temperature sensor
downstream of upper diesel
oxidation catalytic converter
B69 Exhaust temperature sensor
downstream of lower diesel
oxidation catalytic converter
– This printout will not be recorded by the update service. Status: 09 / 2011 –
W14.40>1576>76
W49.20>1022>75
B70 Exhaust temperature sensor
downstream of diesel particulate
filter
B73 Temperature sensor downstream
of SCR catalytic converter