This model has a "tow away" sensor that can easily be set off by rocking or shaking the car. Some of those are adjustable, or just disconnect the tow away sensor and see if that cures your problem.
If you need further help, reach me via phone at https://www.6ya.com/expert/daniel_4061c3d97c12c4c7
Possible the siren has battery in it and is failing or bad. causing the alarm to go off
SOURCE: Release hood on 2003 c230 Mercedes
Pull the red lever under the drivers side dashboard-about where your left knee would be, sitting in the vehicle. The hood will pop up and a tongue will protrude through the front grille. Pull this tongue and at the same time, lift the hood.
SOURCE: Ballpark price on 2007 Mercedes Benz C230 Maintenance B
The dealer near me charges $365 for a 4-cyl, $395 for a 6/8 cyl, or $425 for a 12-cyl. The only actual repair/maintenance you get for that price is an oil change (with Mobil1 and the MB filter, which are CRITICAL, ~$120 on its own) and tire rotation. This makes a lot of people think it's a scam, but really, it's a little steep, but definitely worth doing. The rest of the service consists of a massive inspection of your vehicle covering the following items.
-- Fluid levels
-- Tire tread/pressure/wheel condition
-- Air filter (inc. clean out housing)
-- Cabin air filter (inc. clean out housing)
-- Lubricate sunroof rails, locks, hinges, and seals on body.
-- Drive belt and tensioner
-- HVAC system operation
-- Instruments, cruise control
-- Wipers/washers/lights/horn
-- Windows/sunroof operation
-- Hoses
-- Transmission fluid
-- Brakes
-- Chassis/suspension
-- Driveshaft, inc. flex discs
-- Road test
-- Reset maintenance light
This is actually pretty essential to do, despite seeming like a lot of money for not much work. I have very rarely done one without catching a few things that the customer needs, and often it was a problem that would have gotten far worse had it been left to its own.
SOURCE: How to change air filters on 2007 Mercedes C230 Sport
I have '05, both should be similar:
1.Cabin air filter is located above battery on right side against firewall.
Release three latches, remove filter housing, slide old filter out (housing is flexible), insert new
one, reinstall housing.
2.Engine air filter is on the left side of the block (follow intake hose). Cover is retained with six screws
(six point star shape,I belive called Torox, bit/scredriver size 25). Loosen screws (don' t pull all the
way out of the cover) lift cover , and remove old filter. Insert new one, reinstall cover. DO NOT
OVERTORQUE SCREWS! Screw holes in plastic filter housing strip very easily.
Note: Intake hose is very flimsy, one on my car came apart and had to be replaced.
SOURCE: reset alarm on 2000 Mercedes C230
Disconnect the battery lead at the starter motor.Leave off for a few hours then reconnect it.It should reset it for you.
SOURCE: How do you reset c230 2007 mercedes benz resetting
Try this, it is the procedure
for resetting the ASSIST computer on many Mercs
1...Turn Key to position No:2 in the ignition /
steering lock and immediately press AND Hold the button "000.0" (the
trip reset button) TWICE within the space of 1 (one) second.
2…Turn the key to position No: 0
in the ignition / steering lock. Then release the button.
3...Press AND Hold the button
"000.0" (the trip reset button) and turn Key to position No:2 in the
ignition / steering lock. Keep button pressed
After about 10 seconds the service
indicator will reset and an acoustic signal may briefly sound
That should do it....Good Luck…...Let
me know if it works?
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