How to carry out replacement: Lambda Sensor 500 SL 5.0 (129.066) SL R129
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Change SL R129 320 3.2 (129.064) Lambda Sensor yourself – manuals and video tutorials

How to change lambda sensor on MERCEDES-BENZ SL (R129) – replacement guide

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Download your free tutorial and fix MERCEDES-BENZ SL (R129) 500 5.0 (129.068) problems yourself Download for free 1.04 MB Lambda Sensor for SL R129 Shop now
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When to replace the Lambda Sensor on your MERCEDES-BENZ SL
Recommended replacement interval for the part category Lambda sensor : 100000 km
Important!
This replacement procedure can be used for:
MERCEDES-BENZ SL (R129) 320 (129.064) … View more

The steps may slightly vary depending on the car design.

This video shows the replacement procedure of a similar car part on another vehicle

All the parts you need to replace – Lambda Sensor for SL (R129) and other MERCEDES-BENZ models
How to change Lambda sensor on SL R129 500 SL 5.0 (129.066) – step-by-step instructions for straightforward car repair Lambda sensor
How to change Lambda sensor on SL Convertible (R129) – tips for proper car maintenance
Lambda sensor for SL Convertible (R129) Petrol (224 hp)
Tools
Replacement: lambda sensor – MERCEDES-BENZ SL (R129). Tools you need:
Wire brush
WD-40 spray
Electronic spray
High-temperature ceramic grease
Torque wrench
Combination spanner #22
Drive socket # 8
22-mm oxygen sensor socket
Ratchet wrench
Thread tap
Fender cover
Buy tools
Replacement: lambda sensor – MERCEDES-BENZ SL (R129). AUTODOC experts recommend:
  • After replacing the oxygen sensor, clear the trouble code from the electronic control unit and let the ECU adapt itself to the new sensor.
  • All work should be done with the engine stopped.
Replacement: lambda sensor – MERCEDES-BENZ SL (R129). Recommended sequence of steps:
  1. Step 1
    Before getting down to work, start the engine and let it warm up to operating temperature.
    Step 2
    Open the bonnet.
    Step 3
    Use a fender protection cover to prevent damaging paintwork and plastic parts of the car.
    Step 4
    Shut off the engine.
    Step 5
    Lift the car using a jack or place it over an inspection pit.
    Step 6
    How to change Lambda Sensor on SL R129 1989 - free PDF and video manuals
    Undo the fasteners of the oil pan lower cover. Use a drive socket #8. Use a ratchet wrench.
  2. Step 7
    How to replace MERCEDES-BENZ SL (R129) 500 SL 5.0 (129.066) 1990 Lambda Sensor - step-by-step manuals and video guides
    Remove the oil pan cover.
  3. Step 8
    SL R129 300 SL-24 3.0 (129.061) 1991 Lambda Sensor replacement: free workshop manuals
    Detach the oxygen sensor connector.
  4. Step 9
    Changing Lambda Sensor on MERCEDES-BENZ SL (R129) 320 3.2 (129.063) 1992 by yourself
    Clean the oxygen sensor fastener. Use a wire brush. Use WD-40 spray.
  5. Step 10
    How to remove MERCEDES-BENZ SL 300 SL 3.0 (129.060) 1993 Lambda Sensor - online easy-to-follow instructions
    Unscrew the oxygen sensor fastener. Use a 22-mm oxygen sensor socket. Use a ratchet wrench.
  6. Step 11
    How to replace Lambda Sensor on MERCEDES-BENZ SL (R129) 1994: download PDF manuals and video instructions
    Remove the oxygen sensor.
  7. Step 12
    How hard is it to do yourself: Lambda Sensor replacement on SL R129 280 2.8 (129.058) 1995 - download illustrated guide
    Cut the thread for the new oxygen sensor. Use a thread tap. Use a ratchet wrench.
  8. Step 13
    Need to know how to renew Lambda Sensor on MERCEDES-BENZ SL 1996? This free workshop manual will help you to do it yourself
    Treat the oxygen sensor. Use high-temperature ceramic grease.
  9. Step 14
    Changing of Lambda Sensor on SL R129 1997 won't be an issue if you follow this illustrated step-by-step guide
    Install the new oxygen sensor.
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