Preliminary Work
- Risk of squashing or crushing
- Risk of damage to the vehicle
→ Do not place any solid objects under the raised vehicle.
→ Ensure that the lifting platform is prevented from lowering.
→ Remove solid objects before lowering the vehicle.
→ Raise the vehicle only at the jacking points provided.
→ The outer jacking points should be used primarily.
- Risk of burns
→ Let hot components cool down.
→ Wear personal protective gear.
- Danger of chemical burns
→ Wear personal protective gear.
→ Ensure that there is good ventilation.
→ Avoid contact with caustic fluid.
→ If you do come into contact, wash off immediately with plenty of warm water and contact a doctor if necessary.
- Read out the fault memory using the PIWIS Tester.
- Loosen rear wheel bolts (do not remove).
- Open the engine compartment lid and extend the rear spoiler using the rocker switch in the passenger compartment.
In the case of cabriolet vehicles: Open convertible-top compartment lid.
Refer to the appropriate service information.
- Loosen ground strap for battery.
- Drain refrigerant.
870317 DRAINING AND FILLING REFRIGERANT R1234YF - on "Draining"
870317 DRAINING AND FILLING REFRIGERANT R134A - on "Draining"
- Open coolant cap -1-
and engine oil -2-
on the service tray.
Cover on oil filler neck and coolant
- Remove cover on engine-compartment blower -1-
.
Unclip cover at the front -2- and rear -3- and remove it.
Engine-compartment fan cover
- Removing engine compartment fan.
198119 REMOVING AND INSTALLING ENGINE COMPARTMENT FAN - on "Removing"
Disconnect central connector -1- .
Central connector
- Unclip cover -1- under the rear spoiler at the left and right.
Covers on rear spoiler mounting
- Remove rear spoiler.
- Disconnect lines -1-
for acoustic simulator at the left and right.
260219 REMOVING AND INSTALLING ACOUSTIC SIMULATOR
Unclip lines at the body connection piece -2- and remove them.
Acoustic simulator lines
- Pull off oil filler hose on oil filler neck -1-
at the left by opening the spring band clamp -3-
.
Oil filler hose on oil filler neck
- Remove rear apron.
635519 REMOVING AND INSTALLING REAR BUMPER - on "Removing"
- Remove charge-air cooler.
214319 REMOVING AND INSTALLING CHARGE-AIR COOLER - on "Removing"
- Disconnect cable plugs -1 and 3-
on oxygen sensors downstream of catalytic converter and expose cables.
Disconnect cable plug for oxygen sensor.
Unclip oxygen sensor cables at the retaining clips -2 and 4- and set them down between the engine and engine carrier.
Cable plug and cable for oxygen sensor downstream of catalytic converter
1 Left plug connection for oxygen sensor 2 Left retaining clip 3 Right plug connection for oxygen sensor 4 Right retaining clip - Loosen differential pressure sensor -1-
at the left and right.
Disconnect cable plug -2- and pull differential pressure sensor out of the brackets -Arrows- .
Differential pressure sensor in engine compartment
- Loosen exhaust temperature sensor control unit -1-
.
Release and disconnect cable plug -2- .
Loosen exhaust temperature sensor control unit -1- from holder.
Loosen electric lines -3- from the holders -4- .
Expose electric lines -3- .
Evaluation unit for exhaust temperature sensor
- Release and disconnect cable plug for engine wire harness -1- in the engine compartment at the right.
Cable plug for main wire harness
- Remove cover -2-
on engine control unit.
Unscrew nuts -1- and remove cover.
Cover on engine control unit (DME)
- Disconnect engine wire harness at the engine control unit (DME) -1-
.
Release and disconnect the front three cable plugs -2- on the engine control unit.
The cable plugs are colour-coded and their position on the control unit is indicated by coloured dots.
Engine wire harness on engine control unit (DME)
- Disconnect air-conditioning lines, close off using stoppers and set them aside.
Item -1- :
Item -2- :
Unscrew screws -3 and 4- at the connection point and close off the lines
Air-conditioning line connections in engine compartment
- In the case of cabriolet vehicles: Remove support plate.
Refer to the appropriate service information.
- Remove cover for centre and rear underbody.
Refer to the appropriate service information.
Refer to the appropriate service information.
- Draining coolant from the engine.
193817 DRAINING AND FILLING COOLANT - on "Draining"
Fit both drain plugs with new sealing rings after draining coolant.
Drain plug on coolant regulator housing: > Tightening torque 25 f 19 ftlb.) Nm +/- 2 f 1.5 ftlb.) Nm
Drain plug to coolant pipe: > Tightening torque 25 f 19 ftlb.) Nm +/- 2 f 1.5 ftlb.) Nm
- Loosen drive shafts -1-
on the transmission.
422119 REMOVING AND INSTALLING DRIVE SHAFT - on "Removing"
Unscrew screws -2- Get another person to counter at the relevant wheel.
Replace screws.
Mounting for drive shaft on transmission flange
- Remove rear wheels.
- Disconnect intake manifold -1-
and moulded hose -4-
from the intake air line and turbocharger on the left and right.
Loosen V-band clamp -2- Right side only: Loosen vent line -3- and pull off intake pipe.
Undo screw-type clamp -5- and remove moulded hose.
Intake manifold and moulded hose on turbocharger
- Pull plug connection for oxygen sensor -1- upstream of catalytic converter out of the holder on the carrier and disconnect cable plug -2-
.
Unclip cable -4- .
Oxygen sensor upstream of catalytic converter, cylinder 1-3