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Mercedes-Benz 420SEL Questions

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Both rear windows work fine. Sun roof also not working.
Timing chain broke after an oil change. The chain broke when I was attempting to start the vehicle immediately after the service. The chain then fractured the left valve cover. The chain, I believe, is now off of the sprockets. I can not see the chain through the oil fill opening as I could before the chain broke. The mileage on the vehicle is aproximately 125 K. I am not the first owner so I do know if the The engine never did start so I dont know if there is other internal damage caused by the chain break. I live in Astoria Oregon and found your services through USAA, my insurance company.
Two mercdes mechanics told me, I need to buy a new engine at a cost of $7000.00. advise d me to buy another car. What do you suggest? It has 260,000. It was running very nicely till car got overheated. Only second owner.
Decker model. 1991 420 sel mercedes
1990 mercedes 420 sel have power to dist cap to rotor no spark at plugs
My alarm randomly goes off at any time. Mostly during the night.
What seems to make the problem better or worse? Nothing, just decides to go off by itself
How long have you had this problem? Probably 6 months
How do you open the hood on a 1986 Mercedes 420 sel
Start ok but then black smoke, no acceleration stalling
I have a 91 Mercedes 420 sel, am having issues with vehicle randomly surging while driving, almost like you lift off accelerator, if you push gas pedal, the fuel consumption gauge moves like you are flooring the gas, but the car doesn't respond, is ...
My battery keeps running down due to constant static coming from radio car doesn't need to be started nor does key need to be in the ignition and radio is able to be turned on is this normal? ????
The problem just started but I notice for a few years when I first accelerate, it would race while shifting, but I thought that was only normal. How can you help by offering a diagnosis.
I have replaced the climate control switches, a/c compressor, mono valve, thermostat, I need help and or cost for repairs
I know that the ezl module controls the advanceing and retarding of the ignition not able to adjust the timing
which rims are better alloy or chrome plated?
My light switch seems compromised. When I turn the switch the running lights do not work. My Brake lights work, the front right headlight works and my blinkers work as well. The front two lights only work when I switch on my brights. Is this a ground issue in the switch or just somewhere else in the vehicle? Also, none of my dash or gear selector lights work but the door lights work as well as the overhead cabin light. My fuses are all in check so I have no idea outside of my current knowledge. The vehicle as of now only has 152000 miles. Any insight would be greatly appreciated! Thank you for reading!
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