1. Home
  2. Mercedes Autos and SUVs
  3. Help: Starting Problem With 92 300E

Help: Starting Problem With 92 300E

My car suddenly started to have internitent starting problem. Battery has had plenty of cranking power but motor either starts with lots of difficulty or shut down while stopping at red lights. Finally it didn't start at all. It is towed to Benz dealer. From all previous messages, my thought was on fuel line (filter, pump, relay) but mechanic says they are all ok and he also gets spark but no starting. He finally called and said he thinks it may be a control box that contorls ignition. I have no part number but he said the part runs close to $1000 (US)! Any suggestion what that part would be and any other thoughts. Thanks a million. Adam

Reply to
adam
Loading thread data ...

Change the Over Voltage Relay

Reply to
AJDalton7

Thanks. Can you tell me how over volt. relay goes bad? I used one full tank of midgrade gasoline (89 US octane) few weeks before this happened. Is there any relations? Thanks

Reply to
adam

My 300te was acting this way recently but main clue was that when it quit, it had no spark. The control unit was shutting down when the sensor reading was bad. Then sometimes it decided things were OK and would crank up. Here is the story and a simple way to test:

alt.auto.mercedes "300TE stalls and won't start - faulty crankshaft sensor"

formatting link
btw, if it is indeed a bad control unit you can find used ones at salvage yards and ebay for much less than that.

Reply to
Scott D

OVP is common fault .. the problem is from bad solder joints in relay.. Some guys resolder ... I change them b/c there has been a part improvement/upgrade,,,

Reply to
AJDalton7

MotorsForum website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.