Yea, my gas gauge does the same thing. The only solution I have found is to keep the tank 1/2 way to full and it stays steady.
As for the hand brake:
Detailed steps (MB 190 manual quote):
1. Lift the rear end of the vehicle and secure on stands (park the car on a flat surface and secure the front wheels).
2. Remove completely the compensator screw of the brake cable.
3. Remove one bolt from each rear wheels (or just remove the wheels).
4. Rotate the rear wheel as the opened wheel bolt orifice is oriented 45 degrees up and back so the adjuster is visible (each wheel at the time!!!).
5. With a flat 4,5mm screwdriver press the adjuster gear (for the left wheel upwards, for the right wheel downwards) until the wheel cannot be rotated by hand.
6. Weaken the tightening by rotating in reverse direction the adjuster gear by 2-3 dents until the wheel moves freely (each wheel)
7. Screw back completely the compensator screw of the brake cable untill the cable is perfectly tighened.
8. Pull hard several times (4-5 times) the handbrake lever
9. Verify if the wheels can be rotated by hand with the handbrake lever down
10. Verify if there is a slight braking effect at the rear wheels with the handbrake lever at first dent (if not readjust from step 2)
11. Screw back the wheel bolts (or the wheels if removed completely)
12. Remove stands and level the vehicle.
Tools: jack(s), stands, proper key for the compensator screw, flat screwdriver, pen flashlight, patience.
This thing here we have this thread thingy ya know? At the top. On the main w201 page...F.A....something or other. Youll know what im talking about if ya read
Yeap. Thems just aint words. Yaz gotta read em for them to have any effect.
I just adjusted mine yesterday, but I removed the wheels, calipers & rotors to check the condition of the parking brake shoes first. The rotors were stuck on pretty good, had to use rubber mallet to remove. Took compress air to blow all the dust off, there were a lot...so this alone is worth while doing the extra above steps. The shoes were fine, but the rotors (inside surface) had gouges....so they had to be replaced. I brushed high temp grease on the hub before putting on the new rotors. The hand break handle now just requires two clicks....
I just adjusted mine yesterday, but I removed the wheels, calipers & rotors to check the condition of the parking brake shoes first. The rotors were stuck on pretty good, had to use rubber mallet to remove. Took compress air to blow all the dust off, there were a lot...so this alone is worth while doing the extra above steps. The shoes were fine, but the rotors (inside surface) had gouges....so they had to be replaced. I brushed high temp grease on the hub before putting on the new rotors. The hand break handle now just requires two clicks....
Great job !
I recommend using a can of brake cleaner as opposed to the compressed air. It will clean everything and prevent all the dust from being blown around.