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Disconnect battery. Disconnect harness multi-plug from engine coolant temperature (ECT) sensor Fig.1 [2] . Disconnect harness multi-plug from mass air flow (MAF) sensor Fig.1 [4] . Remove protective cover Fig.1 [1] . Remove plastic tube from wiring harness Fig.1 [3] . Remove insulation tape from wiring harness. Cut engine coolant temperature (ECT) sensor wiring and remove from cable ducting. Cut new engine coolant temperature (ECT) sensor wiring a minimum of 120 mm long. Fit new wiring harness multi-plug to wires Fig.2. Repair wiring with repair kit listed. Seal with insulation tape Fig.3. Remove engine coolant temperature (ECT) sensor. Fit modified engine coolant temperature (ECT) sensor. Tightening torque: 18 Nm. Refit wiring harness multi-plug. Reconnect battery. Erase fault memory.

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1. Drain the cooling system. Refer to the procedure in this section. 2. Remove the upper radiator hose bracket bolt and the upper radiator hose bracket. 3. Reposition the water bypass hose clamp and remove the water bypass hose (8597) from the water hose connection (8592) . 4. If equipped with A/C, remove the drier to evaporator liquid line bracket bolt and the drier to evaporator liquid line bracket to gain access to the water thermostat (8575) . 5. If equipped with A/C, remove the suction accumulator/drier bracket bolts and the suction accumulator/drier bracket. 6. If equipped with A/C, position the suction accumulator/drier (19C836) and drier to evaporator liquid line (19837) out of the way. 7. Remove the four water hose connection bolts and the water hose connection. 8. Remove the water thermostat from the thermostat housing. Installation 1. Clean the thermostat housing cover mating surface and groove of any remaining sealant. 2. Completely clean any coolant from these areas. 3. NOTE: Position the water hose connection on the thermostat housing within five minutes of applying the silicone sealant. Apply a continuous bead of silicone sealant to the inner surface and the perimeter of the water hose connection . The sealant should be 2.0-3.0mm (0.08-0.12 inch) wide on all sealing areas. 4. NOTE: When installing the water thermostat , ensure the jiggle valve is pointing upward.

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Keys, doors, windows, sunroof To raise Turn the rotary switch to any position between d and e. The sunroof w ill automatic ally move to the desired position. When the rotary switch is in position e, the sunroof is fully raised. To lower Turn rotary switch to d. Posit ion memory After the ignition has been switched on, the sunroof c an be automatically returned to its last position b y briefly pressing the rotary switch. Safety function If the sunroof encounters resistance during automatic closing, it is immediately stopped and opened again, as long as the vehicle is stationary. Operated using rotary switch in the overhead control panel. To open Turn the rotary switch to any position between d and ü. The sunroof will automatically move to the desired position. When the switch is in position ü , the sunroof is fully opened . Com fort position Set rotary switch to position f. With the roof in this position, w ind noise is reduced. To close: Turn rotary switch to d. 9 Warning Closing sunroof from outside To close the sunroof from outside with the remote control: Press button p until the sunroof is closed. If the electric windows 3 are to be closed from outside the vehicle, but the sunroof is to be left op en, briefly press the rotary switch before switching off the ignition. Automatic closing 3 See page 33. If when the vehicle is being driven the sunroof encounters resistance during automatic closing, because of the higher closing forces involved the protective function cannot be guaranteed, and there is a risk of injury. If the sunroof movement is stiff, e.g. due to frost, turn rotary switch to d and keep it pressed until the sunroof is closed. Keys, doors, windows, sunroof Sunshade To reduce the sunlight in the interior with the sliding roof closed or raised. O pen or close sunshade as required. When the sunroof is opened, the sunshade is also opened. Overload If the sy stem is overloaded, the power sup ply is automatically cut off for a short time. Fault If the sunroof no longer assumes the desired position automatically , programm e sunroof electronics as follow s: 1. Switch on ignition. 2. Press the rotary switch until the sunroof is shut, then keep it pressed for a t least a further 3 seconds. 3. Turn rotary switch to ü and keep it depressed until the sunroof is open. 4. Turn rotary switch to d and keep it depressed until the sunroof is closed . 5. Turn rotary switch to e and leave there until the sunroof is fully raised. 6. Turn rotary switch to d and keep it depressed until the sunroof is closed . Electrically operated rear window blind 3 Reduces intensity of sunlight shining on to rear seats. Operation w ith ignition switched on. To raise To lower = = Do not operate blind if there are objects lying in front of the rear window. Sun blinds for rear door windows 3 To reduce sunlight a t the rear seats. Pull the blind upwards using the grip and engage it at the top in the door frame. Press N Press N again

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LEGEND 1/1 Battery 2/11 Relay, electric fan, radiator 2/12 Relay, radio interference suppression at fuel injectors 3/49 Throttle switch 2/13 Relay, fuel injection 3/1 Ignition switch 4/10 Control unit, ignition system 6/31 Fuel pump 7/17 Air mass meter 8/5 Air control valve 8/6-11 Fuel injectors 11/1-35 Fuses 17/2 Test socket – Lambdasond 31/13 Ground connection, boot 31/14 Ground connection, main relay console 31/32 Ground connection, engine 4/8 Control unit, LH-jetronic 6/32 Tank pump 7/15 Lambdasond (only B280F) 7/16 Temperature sensor 14/105 Bridge connector 15/1 Positive terminal 17/3 Test socket – idle 31/1 Ground connection, right wing 31/33 Ground connection, engine

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1. If equipped, remove the IP sound insulator. 2. Disconnect the electrical connection from the blower motor. 3. Disconnect the electrical connection from the blower motor resistor. Remove the blower motor resistor retaining screws. 5. Remove the blower motor resistor. INSTALLATION PROCEDURE 1. Install the blower motor resistor. NOTE: Refer to Fastener Notice in Service Precautions. 2. Install the blower motor resistor retaining screws. Tighten Tighten the screws to 1.6 N.m (14 lb in) . 3. Connect the electrical connection to the blower motor resistor. 4. Connect the electrical connection to the blower motor. 5. If equipped, install the IP sound insulator.