Flywheel Locking Tool for Mercedes M651 1.8 & 2.1 Diesel

A Mercedes M651 flywheel locking tool for 1.8 and 2.1 diesel engines, used when securing the flywheel before removing crankshaft front pulley fixings. It bolts in place of the starter motor to stop the flywheel turning during the job, giving more controlled access when working on the front pulley area.

Used for engine servicing and repair work on Mercedes-Benz vehicles fitted with the M651 diesel engine, this flywheel holding tool is relevant for garage work, workshop use and more involved home maintenance where the correct locking point is needed. It suits jobs where crankshaft pulley bolts need loosening without unwanted engine rotation, helping during strip-down and reassembly. Applicable vehicles include A, B, C, CLA, E, GLA, GLK and V Class models from 2008 onwards, along with light commercial models such as Sprinter, Viano and Vito.

By mounting in place of the starter motor, the tool provides a direct way to hold the flywheel while work is carried out on the crankshaft front pulley fixings. The application is specific to Mercedes M651 1.8 and 2.1 diesel engines, so it is suited to focused servicing rather than general-purpose use. OEM reference 651589024000 is supplied for fitment checking, which helps buyers confirm they are choosing the correct tool before starting the job. For regular engine maintenance, using the proper locking tool can help avoid unnecessary movement while parts are being removed.

Flywheel locking tool specifications

• Application: For Mercedes-Benz M651 1.8 and 2.1 diesel engines.
• Function: Locks the flywheel to prevent it turning during crankshaft front pulley work.
• Fitment: Bolts in place of the starter motor for use during servicing.
• Vehicle coverage: Suits various A, B, C, CLA, E, GLA, GLK and V Class models, plus Sprinter, Viano and Vito.
• Reference: OEM code 651 589 02 40 00 (651589024000) for compatibility checking.

A practical choice when the job calls for secure flywheel holding on M651 diesel engines.