1994 Mercedes-Benz C-Class "check security grade" Questions

grade it goes out, never locking out on a code but once in a year. code was #3 cyl. missfiring. i'v changed cap, button, wires, and plugs. when its flashing, seems like it has problems kicking out

Check Engine Light on? Is the Security light flashing?

All modern cars can usually be diagnosed electronically. You need an auto electrician with a pro grade scan tool computer.

...security light lit on the dash , anti-theft problem . Check engine light on , DTC's - diagnostic trouble codes ? Did you do some basic tests first , fuel pressure test , does it have continuous spark ...

security system and engine immobilizer? Did you connect a pro grade scan tool and check for DTCs? Not sure what you mean by 'cranks, then goes dead'? It turns over than then next time you turn the key

check for DTC'S - diagnostic trouble codes in the instrument cluster , vehicle security module , seat control module etc... see if a factory or a professional grade scan tool will communicate with the

...security system and engine immobilizer. If that doesn't work, you find a local auto electrician. Their pro grade scan tool computer will interrogate the electrical systems and check for DTCs. ...

...Check the programming: If the ignition switch was programmed, make sure it was programmed correctly. You may need to have the programming checked by a qualified mechanic or dealership. If you have ...

...security system goes off randomly and the interior light comes on at random when driving showing doors are open, which they aren't. That is a Body Control Module issue or a Communications issue. You ...

...security system is a complex system involving the antitheft module, sensors, the ECM and the BCM. They are computers that can't be reprogrammed to remove anti-theft feature. 'Thinking' is not good. ...

Went up a steep offroad grade and my front fan and three dash guages stopped working. Plz check to see that all under vehicle wiring is secured.