After 2 weeks of sitting in my garage while I was out of town, the 94 E320 won't turn over. Interstate battery is less than one month old, and shows 12.71 volts across the terminals. Indy also replaced the neutral safety switch and shift bushings when the battery was relaced. No problem before the trip. The horn and headlights work, and I think I hear the starter solenoid click. Any thoughts?

Mark

Loose connection somewhere?
If you have 12.7 volt at the battery terminals,& all connections are tight ( starter, etc.), it should spin over.

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2007 C 230 Sport.

Have you tried arming and disarming the security system, maybe from the passenger side. There is a relay that isolates the starter when the alarm is set.

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Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician

Yes Steve, I have. The red indicator light flashes when I lock the doors, and stops when I unlock them. Still will not crank. Could the relay you mention be the problem?

Mark

The relay is always part of the circuit. Whether the alarm is impeding the relay or the relay is bad it is in the way.

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Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician

Just to the left of the brake res. cap is a connector screwed to the wall seperating the engine compartment , 3 wire.
Back probe the V/WT wire and hook a 12v test lamp there .
If this lamp lights when you try the start, the problem is down at the starter.
I suspect that as you heard possible sol click..
A rap on the starter sometimes works, [ temporarily , just to verify ]
It can also be a bad starter ground.. simply jumper cable from bat neg to engine metal..
If no light , it is from there back..