Look no further! This is your ultimate DIY guide in enabling your Dynamic Cruise Control with braking on your BMW!
What do you need?
1) BMW Cruise Control switch ( Part number : 61319263551) for your BMW F45/F46
2) A Torx screw driver
3) A Philip screw driver
4) A pair of scissor
5) 2 x cable tie (small)
6) Some masking or scotch tape to protect your airbag area on the steering wheel
1) You will need to disassemble your new cruise control switch so that you can plug it in with the existing cable on your steering wheel. Cut the cable tie on the wires so that you can pull out the wires safely from the white molex connector and you can put back the cover with its screws back after this operation.
2) You have to perform the same steps for both side of the switches as both switches has to be replaced together to make it work.
3) Paste the masking tape on the marked area around your air bag to prevent from accidental scratches as shown below:
Here are the steps!
Step 1: Rotate the steering wheel to your left:
Step 2: There is a hole just on the steering wheel just behind the speed limiter switch. Use your Torx screw driver to reach out to the hole behind to unscrew the torx screw. You may need to adjust your steering wheel to full extension mode to use your Torx screw driver more effectively.
Once the screw is out, you will be able to pull out the switch slowly by hand. Note: Be prepared! The horn may accidentally be triggered no matter how careful you are!
Step 3: Cut the cable tie that is tied to the multi coloured wires. Unscrew the three screws behind the switch using your Phillips screw driver.
Step 4: Slowly pull out the cover.
Remember that the PCB board is electrostatic sensitive. Try not to touch it with your bare hands!
Step 5: Unplug the PCB from the molex connector.
Step 6: Connect it with your new Cruise Control switch.
Step 7: Put back the cover and the 3 x Phillips screws. Use a new cable tie to tie the wires back as well.
Step 8: Push the switch back slowly to the steering wheel. You may want to put some tape protection besides the edge of the air bag/horn before performing this operation to avoid scratches. Otherwise, you can always use a fine sandpaper to sand off those scratches. Note: Be prepared! The horn may accidentally be triggered no matter how careful you are!
Step 9: Looks completed? Well not quite so. You still need to replace the right hand side switch as well! The "Res" button on the Cruise Control switch will become the speed limiter function if you did not change the right hand side switch. Test it if you want!
Step 10: Rotate your steering wheel to the right as shown below:
Step 11: Perform the exact same steps as mentioned previously above. Note that there are two connectors connected to this switch. It is harder to pull out as it is held tightly by the black connector.
Step 12: Cut the cable tie and free up the wires.
Step 13: Unscrew the 3 x Phillips screws and remove the back cover. Plug the molex connector back to the switch.
Step 14: Put back the cover as show below and screw back the 3 x Phillips screws.
Step 15: Note how short this black connector can be as highlighted in yellow circle below. How can you ever attached this connector back to the switch in such confined space? Does that means you have to take out the air bag???
Warning: This is the most difficult part of the operation! This operation is more suitable for people with smaller fingers. Maybe you will need to ask your wife or girl friends to assist in this operation!
The fortunate answer is no! You don't have to take out the air bag. Simply pull the black connector together with the wire using only a tiny bit of your strength to extend it by few millimeters. Don't pull it too hard until it gets disconnected from the steering wheel!
With the extended length, you will be able to plug it back to the switch securely and can push it back to the steering wheel. It takes some skill to do that but it's definitely possible.
Step 16: There you have it! A Cruise Control switch enabled car?
Step 17: Not yet, you still have some coding to do! Perform VO coding by adding option 544 and then perform "Code" to all modules within your ECU. Remember to switch off your engine before doing that as it involves coding the DME module which requires engine to be stopped.
The whole process will takes about 5 to 10 mins. Lots of errors will start popping up! Once the coding has completed (With some errors reported on the modules in your E-Sys), wait for about 5 mins before starting your engine. Press the cruise control switch button and presto! The cruise control indicator is lighted up in your Kombi screen as shown below!
Coding success! Cruise Control ready!!!