Bosch Starter Motor 12V 10 Tooth CW Part No. 1986S00779

This Bosch starter motor is a 12V unit with 10 teeth and clockwise rotation, identified by part number 1986S00779. It sits in the rotating electrical product group and is supplied as each, with a 12 month warranty.

The listed design focus is fit and performance to meet OE starters, with a build intended to withstand harsh environments. For a starter motor, those details matter because the voltage, tooth count, rotation, and mounting arrangement all need to line up with the vehicle application.

There are 2 mounting bores listed for this starter motor. That is a useful checkpoint when comparing against the original unit, along with the 12V rating, 10 tooth gear, and CW rotation shown here.

Key Features

• Bosch starter motor
• 12V electrical system
• 10 tooth drive
• Clockwise rotation (CW)
• 2 mounting bores
• Designed to meet OE starter fit and performance

Specifications

• Part No.: 1986S00779
• Brand: Bosch
• Product type: Starter motor
• Voltage: 12V
• Number of teeth: 10
• Rotation: CW
• Number of mounting bores: 2
• Warranty: 12 months

Fitment guidance

• Mercedes-Benz
• Mercedes-Benz C-Class
• Mercedes-Benz CLK
• Mercedes-Benz E-Class
• Mercedes-Benz G-Class
• Mercedes-Benz M-Class
• Mercedes-Benz S-Class
• Mercedes-Benz SL

Application and Buying Notes

When replacing a starter motor, confirm the part number 1986S00779 first, then compare the 12V rating, 10 tooth drive, clockwise rotation, and 2 mounting bores against the original unit. Those points are the most practical checks before ordering, especially where the vehicle family includes multiple starter variants.

The fitment listing references Mercedes-Benz, including C-Class, CLK, E-Class, G-Class, M-Class, S-Class, SL, and SLK applications. Because starter motor listings can vary within the same model range, it is still important to match the original starter’s physical details and electrical specification rather than relying on model name alone.

Bosch notes this starter motor is designed in fit and performance to meet OE starters. That does not remove the need to verify the existing part, but it does give a clear benchmark for buyers comparing the replacement to the original unit in terms of mounting, rotation, and drive tooth count.

If you are checking a vehicle already fitted with a Bosch starter or an equivalent replacement, use the part number, terminal arrangement if visible on the vehicle, and the mounting bore count as part of your comparison. The packaging size listed is 32.5 x 18 x 13.9, which may also be useful when planning storage or dispatch for workshop use.

Before supply, the safest approach is to confirm the original unit details against the listed part number, voltage, output rating, mounting arrangement, and pulley configuration. That checking process is standard practice in the parts trade because visually similar units can still differ in service-critical ways.

For workshop, fleet, and equipment applications, accurate identification of part number 1986S00779 helps avoid unnecessary freight, additional labour, and vehicle or machine downtime. Where the application is not straightforward, the original unit, OEM reference, or workshop records should be used as the primary confirmation point.

Relevant published details for this unit include Type STARTER MOTOR, Unit of Measure EACH, Warranty 12 Months, Rotation CW, Number of mounting bores 2, Packaging width 18, Manufactured in China, Product Group 1 ROTATING ELECTRICAL, Part No. 1986S00779, Brand BOSCH.

Additional published details for cross-checking include Description Bosch Starter Motor 12V 10Th CW, Number of Teeth 10, Voltage 12, Packaging length 32.5, Packaging height 13.9, Product Group 2 STARTER MOTORS.

Bosch Starter Motor 12V 10Th CW. Part number 1986S00779 should be checked first. Listed voltage is 12. These details form the core reference points used by parts interpreters when confirming the correct replacement.

For part number 1986S00779, the normal identification sequence is part number, electrical rating, mounting arrangement, connector or terminal style, and pulley or drive details. Using those checkpoints helps confirm that the listed unit matches the service requirement rather than only looking similar.

For a starter motor in workshop, fleet, trade, agricultural, or construction service, the listed voltage 12 should be checked carefully. Incorrect selection can affect installation time, return freight, and equipment availability.

Available application references include MERCEDES-BENZ C-CLASS, MERCEDES-BENZ C-CLASS 1997, MERCEDES-BENZ C-CLASS 1998, MERCEDES-BENZ C-CLASS 1999. Even with application listings, final confirmation should still be based on the exact unit being replaced and the service requirements of the vehicle or machine.

Compatibility note: Confirm compatibility by matching part number 1986S00779, 12V voltage, 10 tooth count, clockwise rotation, and the 2 mounting bores against the vehicle’s original starter motor and application details before purchase.

FAQ

What is the part number for this Bosch starter motor?

The listed part number is 1986S00779. For this listing, part number 1986S00779 is the main reference point. Listed voltage is 12. Published fitment references include MERCEDES-BENZ C-CLASS, MERCEDES-BENZ C-CLASS 1997, MERCEDES-BENZ C-CLASS 1998. These details should still be checked against the original unit before ordering.

What voltage is this starter motor?

It is a 12V starter motor. For this listing, part number 1986S00779 is the main reference point. Listed voltage is 12. Published fitment references include MERCEDES-BENZ C-CLASS, MERCEDES-BENZ C-CLASS 1997, MERCEDES-BENZ C-CLASS 1998. These details should still be checked against the original unit before ordering.

How many teeth does the drive gear have?

The starter motor is listed with 10 teeth. For this listing, part number 1986S00779 is the main reference point. Listed voltage is 12. Published fitment references include MERCEDES-BENZ C-CLASS, MERCEDES-BENZ C-CLASS 1997, MERCEDES-BENZ C-CLASS 1998. These details should still be checked against the original unit before ordering.

What direction does it rotate?

The rotation is listed as clockwise, or CW. For this listing, part number 1986S00779 is the main reference point. Listed voltage is 12. Published fitment references include MERCEDES-BENZ C-CLASS, MERCEDES-BENZ C-CLASS 1997, MERCEDES-BENZ C-CLASS 1998. These details should still be checked against the original unit before ordering.

Which vehicles are listed in the fitment guidance?

The fitment guidance references Mercedes-Benz applications, including C-Class, CLK, E-Class, G-Class, M-Class, S-Class, SL, and SLK. For this listing, part number 1986S00779 is the main reference point. Listed voltage is 12. Published fitment references include MERCEDES-BENZ C-CLASS, MERCEDES-BENZ C-CLASS 1997, MERCEDES-BENZ C-CLASS 1998. These details should still be checked against the original unit before ordering.

What should I check before buying this starter motor?

Check the part number 1986S00779, 12V rating, 10 tooth count, clockwise rotation, and 2 mounting bores against the original unit and vehicle application details. For this listing, part number 1986S00779 is the main reference point. Listed voltage is 12. Published fitment references include MERCEDES-BENZ C-CLASS, MERCEDES-BENZ C-CLASS 1997, MERCEDES-BENZ C-CLASS 1998. These details should still be checked against the original unit before ordering.