Supplementary heating

Chapter overview

• Self-diagnosis
  1
• Supplementary heating
  2
• 1 Auxiliary heater -D3W- (supplementary heater), vehicles: ▸ 05.00
  2
• 1.1 Repairing auxiliary heater -D3W- (supplementary heater)
  2
• 1.2 Removing and installing exhaust system
  4
• 1.3 Removing and installing auxiliary heater -D3W-
  6
• 1.4 Dismantling and assembling auxiliary heater -D3W-
  9
• 1.5 Removing heater control unit J162
  10
• 1.6 Removing glow plug for heater Q9
  11
• 1.7 Removing flame monitor G64
  11
• 1.8 Connecting auxiliary heater -D3W- to coolant circuit
  12
• 1.9 Coolant hose routing
  12
• 1.10 Coolant hose routing on vehicles with 2nd heat exchanger
  13
• 1.11 Auxiliary heater -D3W- fuel supply
  14
• 1.12 Removing and installing metering pump V54
  15
• 1.13 Regulation of auxiliary heater -D3W-
  16
• 1.14 Start sequence
  17
• 2 Auxiliary heater -D5W- Z (supplementary heater), vehicles 06.2000 ▸
  19
• 2.1 Repairing auxiliary heater -D5W- Z (supplementary heater)
  19
• 2.2 Connecting auxiliary heater -D5W- Z to coolant circuit
  21
• 2.3 Coolant hose routing on vehicles with 2nd heat exchanger
  22
• 2.4 Regulation of auxiliary heater -D5W- Z
  23
• 3 Auxiliary heater -B4W/ D4W-, vehicles ▸ 05.2000
  25
• 3.1 Diagnosis with the diagnostic tester 5019
  25
• 3.2 Bleeding coolant circuit
  30
• 3.3 Road test for auxiliary heater in vehicle without Climatronic
  31
• 3.4 Road test for auxiliary heater in vehicle with Climatronic
  33
• 3.5 Repairing auxiliary heater -B4W- / -D4W-
  35
• 3.6 Removing and installing heater unit -B4W- / -D4W-
  37
• 3.7 Dismantling and assembling heater unit -B4W- (petrol)
  39
• 3.8 Dismantling and assembling heater unit -D4W- (diesel)
  42
• 3.9 Removing heater control unit J162
  43
• 3.10 Renewing combustion air blower V6
  44
• 3.11 Removing flame monitor G64
  44
• 3.12 Removing overheating sensor G189
  44
• 3.13 Removing coolant temperature sender for heater G241
  45
• 3.14 Removing glow plug for heater Q9
  45
• 3.15 Checking flame monitor G64
  45
• 3.16 Checking overheating sensor G189
  46
• 3.17 Checking coolant temperature sender for heater G241
  46
• 3.18 Connecting auxiliary heater -B4W- and -D4W- to coolant circuit
  47
• 3.19 Fuel supply to auxiliary heaters -B4W- / -D4W-
  47
• 3.20 Removing and installing metering pump V54
  50
• 3.21 Regulation of auxiliary heaters -B4W- and -D4W-
  51
• 4 Auxiliary heater -B5W- S / -D5W- S, vehicles 06.2000 ▸
  53
• 4.1 Repairing auxiliary heater -B5W- S / -D5W- S
  53
• 4.2 Removing ambient temperature switch F38
  55
• 4.3 Removing circulation pump V55
  55
• 4.4 Removing pre-selection clock E111
  56
• 4.5 Removing and installing exhaust system
  56
• 4.6 Road test for auxiliary heater in vehicle without Climatronic
  58
• 4.7 Road test for auxiliary heater in vehicle with Climatronic
  60
• 4.8 Removing and installing heater unit
  61
• 4.9 Dismantling and assembling heater unit
  64
• 4.10 Removing heat exchanger
  66
• 4.11 Removing flame monitor G64
  67
• 4.12 Removing glow plug for heater Q9
  67
• 4.13 Removing heater control unit J162
  68
• 4.14 Renewing combustion air blower V6
  68
• 4.15 Removing overheating sensor G189
  69
• 4.16 Removing coolant temperature sender for heater G241
  69
• 4.17 Checking flame monitor G64
  69
• 4.18 Checking overheating sensor G189
  70
• 4.19 Checking coolant temperature sender for heater G241
  70
• 4.20 Checking ambient temperature switch F38
  70
• 4.21 Connecting auxiliary heaters -B5W- S and -D5W- S to coolant circuit
  72
• 4.23 Coolant hose routing on vehicles with 2nd heat exchanger
  75
• 4.25 Fuel supply to auxiliary heaters -B5W- S, -D5W- S or -D5W- Z
  76
• 4.26 Removing and installing metering pump V54
  78
• 4.27 Testing quantity of fuel delivered
  79
• 4.28 Regulation of auxiliary heaters -B5W- S and -D5W- S
  80
• 4.29 Start sequence
  82
• 5 Auxiliary heater -D5Z- F, vehicles 05.2004 ▸
  83
• 5.1 Repairing auxiliary heater -D5Z- F
  83
• 5.2 Removing ambient temperature switch F38
  83
• 5.3 Removing circulation pump V55
  83
• 5.4 Removing and installing exhaust system
  83
• 5.5 Road test for auxiliary heater in vehicle without Climatronic
  83
• 5.6 Road test for auxiliary heater in vehicle with Climatronic
  83
• 5.7 Removing and installing heater unit
  83
• 5.8 Dismantling and assembling heater unit
  83
• 5.9 Removing heat exchanger
  85
• 5.10 Removing and installing flame monitor G64
  86
• 5.11 Removing glow plug for heater Q9
  87
• 5.12 Removing heater control unit J162
  87
• 5.13 Renewing combustion air blower V6
  87
• 5.14 Removing overheating sensor G189
  88
• 5.15 Removing coolant temperature sender for heater G241
  88
• 5.16 Checking flame monitor G64
  89
• 5.17 Checking overheating sensor G189
  89
• 5.18 Checking coolant temperature sender for heater G241
  90
• 5.19 Checking ambient temperature switch F38
  91
• 5.20 Connecting auxiliary heater -D5Z- F to coolant circuit
  91
• 5.21 Coolant hose routing on vehicles with 2nd heat exchanger
  91
• 5.22 Bleeding coolant circuit in vehicles with auxiliary heater -D5Z- F
  91
• 5.23 Fuel supply to auxiliary heater -D5Z- F
  91
• 5.24 Removing and installing metering pump V54
  91
• 5.25 Testing quantity of fuel delivered
  91
• 5.26 Regulation of auxiliary heater -D5Z- F
  91
• 5.27 Start sequence
  92
• 6 Auxiliary heater -D5S- F / -B5S- F, vehicles 05.2004 ▸
  94
• 6.1 Repairing auxiliary heater -D5S- F / -B5S- F
  94
• 6.2 Removing ambient temperature switch F38
  94
• 6.3 Removing circulation pump V55
  94
• 6.4 Removing pre-selection clock E111
  94
• 6.5 Removing and installing exhaust system
  94
• 6.6 Road test for auxiliary heater in vehicle without Climatronic
  94
• 6.7 Road test for auxiliary heater in vehicle with Climatronic
  95
• 6.8 Removing and installing heater unit
  95
• 6.9 Dismantling and assembling heater unit
  95
• 6.10 Removing heat exchanger
  95
• 6.11 Removing and installing flame monitor G64
  95
• 6.12 Removing glow plug for heater Q9
  95
• 6.13 Removing heater control unit J162
  95
• 6.14 Renewing combustion air blower V6
  95
• 6.15 Removing overheating sensor G189
  95
• 6.16 Removing coolant temperature sender for heater G241
  95
• 6.17 Checking flame monitor G64
  96
• 6.18 Checking overheating sensor G189
  96
• 6.19 Checking coolant temperature sender for heater G241
  96
• 6.20 Checking ambient temperature switch F38
  96
• 6.21 Connecting auxiliary heater -D5S- F / -B5S- F to coolant circuit
  96
• 6.22 Coolant hose routing on vehicles with 2nd heat exchanger
  96
• 6.23 Bleeding coolant circuit in vehicles with auxiliary heater -D5S- F / -B5S- F
  96
• 6.24 Fuel supply to auxiliary heater -D5S- F / -B5S- F
  96
• 6.25 Removing and installing metering pump V54
  96
• 6.26 Testing quantity of fuel delivered
  97
• 6.27 Regulation of auxiliary heater -D5S- F / -B5S- F
  97
• 6.28 Start sequence
  97