Skip the auto shop - Our mechanics make house calls

Q: Power locks orthopedic seats

asked by on

My 300E was working great until I got the oil changed. Now my power locks and air operated orthopedic seats don't work. The air pump doesn’t come on either. Do you think there is a connection between the oil change and these problems that just arose? I can’t hear the air pump come on when I turn the key as usual. What do you think happened? How can I fix these problems?

Both of these systems are controlled by fuse ’A’ in the electrical center of your 1990 Mercedes-Benz 300E. If this fuse is blown it would prevent both the locking and orthopedic seats from functioning. I doubt it was related to the oil change - this was most likely coincidental. But if replacing the fuse does not fix the issue, then you may have a direct short to ground somewhere so the wiring would need to be traced. If this becomes the case, you may want to enlist the help of a mechanic, such as one from YourMechanic, who can diagnose and restore your power locks and seats.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: What does the check tire pressure warning mean?

Your car’s tire pressure monitoring system (TPMS) is designed to alert you if one of your tires drops below the threshold pressure (PSI). It does this by turning on the Low Tire Pressure light on the dash. However, you will...

Q: How do the child locks work?

It’s important for anyone traveling with Children to ensure their safety at all times. Your car offers child locks on the rear two doors so that little ones can’t accidentally open the door. To use the child locks, follow these...

Q: gas gage dont work after battery unhooked

With your car I have seen the gas gauge go all the way around the gauge and get stuck on the other side of the stop from the bottom of the gas gauge. Easiest way to fix it is to...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.