1990 560sel switched out the becker radio with a new sony and now every few days i blow the #5 fuse and it won't start. changed the fuse today and it still won't start. so what in the heck is going on. this car has too many gremlins i am getting close to those dredded words SELL!

one of the things controlled by fuse 5 is electronic engine controls.did you connect radio to some other connection other than the original wires for the becker?

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David S Poole
European Performance
Dallas, TX
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"Fortune favors the prepared mind"
1987 Mercedes Benz 420SEL
1988 Mercedes Benz 300TE (With new evaporator)
2000 Mercedes Benz C280
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Sounds like an issue you caused in the wiring of the radio.

Start by pulling out the junk headunit and rechecking everything.

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'85 300SD 245k
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Do you have ignition on the coil while starting the car?

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380SE 1984 <------- Totaled by flipping accident
300SE 1988 <------- Sold
Volvo S70 2000 <---- 4 family
Opel Omega 2002 <-- 4 family
560SEC 1989 <------ Sold
560SEL 1990 <------ Sold
560SEL 1991 <------ 4 my mother
560SEL 1989 <------ Sold
600SEL 1992 <------ Current

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what we did was run new wires for the sony radio . every time i crank the car it bolws #5 fuse. then i have to take the negative post off the battery re attach it then replace the fuse it will start but it is going to not start again once you shut it off.