Top 20 1990 Mercedes-Benz S-Class - Page 2 Questions & Answers

check fluid level and all connections

It probably lost the rolling code, you need to find your owners manual and reprogram the system with your garage door opener, or the learning button on your garage door unit.

I think you could use this manual method instead.. My nephew use it to repair my car and it's totally repaired now. Here's the website he bought it from. reliable-store

If you're finding it difficult to service/repair your car, get one of those online manuals. You'll not have to wait for others to answer, or rely on mec hanics and all. Plus i know a website that sells very cheap but very very good manuals online, without expiry i.e. for lifetime. for this u can try reliable-store which is pretty good

I've had a few Mercedes and I seem to remember they had a fusible link between the fuse box and battery. It is a metal strap that will open under excessively high current.

Possibly chassis ground, loose, corroded, otherwise failing.

iring, schematic, electrical diagrams, torq setting, error/fault codes, full assembly/dissembly, service instructions and a lot moreetc are basic contents of these online books they here on this website https://big-manuals.com/

I would check the fuse box for a blown fuse

sounds like bad battery connection

It is at the back of engine , at bottom of transmission bell housing in center

this will need inspecting by a auto electrician as it would seem either the motor that lowers the roof is either faulty or there is a problem that is earthing out the component somewhere, worn wire or something like that, these are nearlry impossible faults to trace without the correct tools and knowledge

it is function of cluster it is a small speaker on board get another cluster on e bay or check all your wiring

It's in the trunk behind rear seat backrest.

The air struts have a safety valve in them you would have had to crack the line and let the air slowly leak out

Will probably require a software update from the dealer

I had mine replaced when this happened to mine some years ago

On center console knob select vehicle settings click on that then choose time and date and select your actual time and date

Camshaft cover ends, two of them.

Probably a lot more thing you could change throttle body, MAF, sensor, plug wires and many other thing. You would help yourself by finding out what codes are present if you have a check engine light. If you do not have check engine light I would make sure there are none before spending any more money. Where I live most auto parts store will check your codes for free.