woodwoman

TRIED TO START MY SL AFTER BEING STORED IN A UNHEATED GARAGE IN THE CANADIAN WINTER. STARTS RIGHT AWAY, THEN AFTER A FEW SECONDS IT DIES, ALMOST LIKE THE IGNITION KEY WAS TURNED OFF. IT WILL KEEP RUNNING AT A HIGH RPM BUT STILL DIES WHEN ON IDLE. ALSO THE TACHOMETER WON,T WORK. ANY SUGGESTIONS. THANKS BARRY

slik560

Sounds like it's just running off the initial shot of fuel from the cold start valve. My guess is that the fuel system is gummed up - I always use a fuel stabilizer when I put my 560SL away for the winter...and I start it at least once a week. The fuel distributor & injectors may need a good cleaning, along with a new fuel filter and an inspection of the pumps. I'd recommend finding a good independent shop and let them go through it. A dealer will kill you on something like this. The car is older than a lot of the techs that work there, most likely. Good luck with it. The 560SL can be an aggravating vehicle for certain.

abiby

I believe if you check the online manual as linked to below, you'll find information on how to jumper your fuel pump relay.

http://www.startekinfo.com/StarTek/o...tedDocId=11883

If my assumption is correct, after jumpering (for testing only) your car will start and run.

The fuel pump relay requires a signal that the engine is running in order for it to continue powering the fuel pump. I assume this is the signal which operates the tach and as it isn't operating, you will need to troubleshoot that circuit to actually repair both issues.

OTOH, I could be full of crap and/or completely wrong.