What is your question?
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What is your question?
Ok car ignition switch operates,lights on dash and key fob locks and unlocks opens trunk but will not crank the car we have checked and manually operated start relay but no crank and while cranking no spark what gives alarm works tried locking and unlocking all tried leaving key on for 20 minutes nothing changed
How long has your 2000 Mercedes-Benz E320 had this problem?
More than a week
1 Reply
Hi, this is Bo, an auto expert on RepairPal's Car Genius team! This has the hallmarks of an immobilizer issue. The E320 of this era uses Mercedes EIS (Electronic Ignition Switch) and an immobilizer system that has to recognize the key's transponder chip before it allows cranking or spark. Everything else working, lights, locks, trunk, alarm, tells us power is fine but the immobilizer may not be seeing the key properly. The 20 minute wait trick you tried is actually a known Mercedes immobilizer reset procedure so good instinct there. At this point the EIS unit itself, the key transponder, or the immobilizer control module are the prime suspects and unfortunately this really needs a Mercedes capable scan tool to dig deeper! If you need any further advice or want help finding a trusted RepairPal shop in your area, please feel free to call us at 877-913-1554