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