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1990 Mercedes-Benz 560SEC Repair and Maintenance

A guide to problems, costs, maintenance and repair for your 1990 Mercedes-Benz 560SEC

1990 Mercedes-Benz 560SEC Problems

The fuel pump and/or fuel pump relay can fail, causing the car to crank over but not start. Proper diagnoses will be necessary to confirm if the pump or relay is at fault.

Due to wear, high usage vehicles can experience ignition lock and tumbler failures. The ignition lock cylinder will generally require replacement to correct this concern.

One or more blend door vacuum actuators may fail resulting in the incorrect output temperature from the HVAC system. Failed actuators will require replacement to restore proper HVAC operation.

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1990 Mercedes-Benz 560SEC Questions

I checked fuses they are not blown, what should I look for next? Any suggestions? Since both front seats can not be adjusted I am wondering if a wiring issue or module may be out. Where can I go in the car to check?

Is it possible to drop in a modern AMG engine into a 560sec (or any model from 2000 motors kompressor

or any new engineer from 2004 kompressor to 560sec

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