P0616 Mercedes-Benz Starter Relay Circuit Low

Possible causes

– Park/neutral position (PNP) relay (starter relay)
– Park/neutral position (PNP) relay (starter relay) harness is open or shorted
– Park/neutral position (PNP) relay (starter relay) circuit poor electrical connection
– Faulty Transmission Control Module (TCM)

What about the obd code?

The P0616 Mercedes-Benz code is detected when the Engine Control Module (ECM) has detected an intermittent short to ground on the starter relay control circuit.

Symptoms

– Engine Light ON (or Service Engine Soon Warning Light)
– Engine may not start

P0616 Mercedes-Benz Description

Transmission Control Module (TCM) controls park/neutral (PNP) relay (starter relay) in IPDM E/R. TCM switches PNP relay