Description
Vehicle Compatibility & OE Cross Reference
Alternator voltage regulator for select Mercedes-Benz applications where the original regulator matches a 2 pin connection with IDL-CPU plug type and the same charging characteristics. Listed as a Bosch 2 pin regulator for Mercedes CLK55, E430, and SL500 applications where a matching alternator is fitted. Confirm fitment by matching the regulator plug style and OE cross reference numbers before ordering.
OE Numbers By Brand
- Mercedes-Benz: A0121540302; 0031542506; 0111542702; 0121541302; 0131548002; 0131548202; 0141540102
- BMW: 12317523897; 12317531386; 12317550319
- VAG: 077903803A
Specifications
- Reference: REG1068
- Part Type: Alternator Voltage Regulator
- Manufacturer: Bosch
- System Voltage: 12V
- Charging Voltage: 14.5V
- Operating Voltage: 14V
- Connector / Pins: 2 Pin
- Plug Type: IDL-CPU
- Specification: 2.5 Sec. LRC
- Active Lamp: Yes
- Short Circuit Protection: Yes
Features
- Regulates alternator field current to maintain stable charging output on compatible Bosch alternators
- 2 pin IDL-CPU plug type to match the specified regulator interface
- 14.5V charging specification with 2.5 sec LRC characteristic for matching regulator behaviour
- Active lamp function with short circuit protection for supported charging circuits
- OE cross references included to support accurate matching before fitment
Why Buy From Us
- Local South African stock with nationwide courier delivery
- 12-month warranty subject to correct application and installation
- Fitment support using alternator labels, regulator markings and plug photos
- Trusted by workshops and fleet operators for reliable charging system components
Trusted by thousands of South African drivers for quality and durability.
Installation & Maintenance Tips
- Disconnect the battery before alternator removal or regulator replacement
- Confirm the regulator plug is 2 pin IDL-CPU and cross check at least one OE number before fitting
- Inspect brushes and slip rings while the alternator is open and replace worn components where required
- Ensure battery terminals and earth connections are clean and tight to prevent voltage drop and repeat failures
- After installation, verify charging voltage under load and confirm warning lamp behaviour
- If you are unsure about alternator repairs, have the regulator fitted and tested by a qualified auto electrician
Important: Product information, kit contents and compatibility are provided as a guide and may contain errors or omissions. Please verify that this part and any included components are correct for your vehicle before installation. For full details see our Website Disclaimer (Errors & Omissions).