Use it to test the starter function and to rotate the engine while working under the hood
This simple push-button switch with clip leads can be used on both gas and diesel engines. If you are not sure why your engine does not turn over when you turn the key , it can be used to test if your starter motor is working before looking into the ignition switch or neutral safety switch. It makes doing a one-person compression test possible without having to get in and out of the car.
Remote Starter Switch
$24.00
SKU:
TUL-RSSWITCH 
Product Details
A video of this switch in use is included in my V8 compression test video.
Related Products:
On Demand Video
$9.99
Early V8 Engine Compression Test Procedures - On Demand Video
30 minute Instructions apply all M116 and M117 engines from 1970 to 1991. Principles also apply to 4 and 6 cylinder gas engines during that same period.
This video will walk you step-by-step through the proper procedures for doing a full compression test on your older V8 Mercedes Engine.