All 1990 Mercedes-Benz 420SEL questions

I would like to turn it off or even on?

My car is a 1986 420se and blows blue smoke from the exhaust after a down hill run

Have a blown head gasket and want to add sealer to radiator

now the car wont start when turned over

emissions testing

I've had a wheel alignment and balancing. It does fine at speeds so far up to 70mph. but hi...

I added two quarts

I have tried to unplug all the electrical plug and clean with CRC QD Electrical Contact Cleaner A...

I have 1986 Mercedes-Benz.The rear brakes need to be replaced.I have already removed brake calipe...

Engine starts fine and idles okay, but has no power, economy gage all the way in red, doesn'...

I already check the fuel pump, the relay and swith.

Do you think the catalytic affect this sit...

can one man replace it or not

The fuel sensor in the "dash" area has been swapped. It's had a tune up.I happens ...

or when I put my foot on the brakes. I replaced blower motor . problem still there.

position of drivers seat is locked .. How do I unlock it so I can adjust seat for me.