A faulty transmission control module (TCM) most often causes limp mode with the gearbox stuck in one gear, harsh jolts when you select D or R, erratic gear changes, flashing PRND letters and a gearbox or engine warning light. However, the same symptoms are often caused by a low gearbox oil level, a weak battery, a poor earth or a faulty sensor. To test a transmission control module, start by checking the battery and reading the fault codes with a diagnostic tool that can talk to the gearbox control unit, then check the power supply, the connector, the oil and the live data. Below we explain the symptoms, the diagnostic steps and what the most common fault codes mean.
Comfort control module Mercedes R129 SL A1298200097 09090589731898
Vendors's code: A1298200097
Product code: A1298200097
Barcode:
Code 39:
ISBN:
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Is Mercedes R129 SL the right part for your car?
Used, working part: comfort control module for Mercedes R129 SL - numbers A 129 820 00 97 / A1298200097; 0909 0589.731-898 / 09090589731898. Compare the numbers with the label of the part currently in your car.
Comfort control module Mercedes R129 SL
The part in this listing handles body electronics in: Mercedes R129 SL. Choose it by the numbers on the list. It is used, working and in good condition.
Part markings
- A 129 820 00 97 / A1298200097 - Mercedes-Benz number (OEM)
- 0909 0589.731-898 / 09090589731898 - additional part number
- 909 589 73 1 / 909589731 - additional part number
Listing details
- Mercedes R129 SL - model
When to replace the part
- the tester reports no communication with the module,
- several unrelated functions stop working at the same time,
- wipers or lights switch on by themselves,
- the car does not respond to the remote.
Inspect the module connectors: green or burnt pins cause symptoms similar to faulty electronics.
Role of the part in the car
The comfort control module controls body functions such as interior lighting, central locking, windows or wipers; the exact scope depends on the make and version of the car.
Fitment
Compare number A 129 820 00 97 in full with the number on your part. Different versions were fitted to the same models, so the number decides, not the model alone.
Frequently asked questions
| What does "used, working" mean? |
|---|
| We sell it as a used, working part in good condition; the warranty length is given in the offer features. |
| Is the part new? |
| The part is used but working. The warranty is stated in the product features. |
Any doubts? Send a photo of your part to contact@auto24parts.com - we will check it for you.