When the vehicle has been parked for a couple of days, the electrical system rapidly drains the battery. I verified this with a digital meter and it read 200ma so the car running 10 times the standby current that it should be. My battery is dead after seating overnight. At this point the electronics are active as a warning message was displayed when the parking lights were on. Is it then good trouble shooting to pull fuses to see which one is still drawing current?? Please call Mercedes usa and report this problem. The battery has been drained down twice. I thought that Merecedes were supposed to be the dogs bits! This leaves me stranded and unable to drive my vehicle.
The alternator reg pack could have a short. When I turn off the lights the current drops immediately to 500ma then to 200ma. If you want to test which module it is. This screw, when let out, will release all the oil, and with a lil bit of force, so think of this and place your oil catcher pan on the ground just forward of the hole, and slide it back as needed as your oil drains out and pressure releases. The only set of fuses I can find is under the boot floor but there only seems to be a handful of fuses there.
If I clean up the contacts, will this sort the battery drain, or has the unit failed internally? I was obviously thinking of something else at the time. I was sat in the car today with the key out, waiting for about 25 minutes. Thanks guys, where is this seat module? Need Help in getting this car ready for my new teenage driver. If you are having powerdrains as a result of this, your battery will drain quite quickly leaving you in a dangerous unstartable position. The car has been fine for months but the cold weather has seen the problem return with a vengeance.
At the bottom of the door pull handle next to the armrest there is an oblong slot, insert a flat screwdriver and prise the top half off, it is just clipped in. The poor chap is perhaps to be excused for thinking that all reasonable checks have been made? Now pull t … he seat out and turn it upside down, There are two 7 mm screws in a metal bracket that hold the module on in the front. So the moral of the story lock the car with alarm set it will start after several weeks of setting. These are not cheap control modules, but the only … way to repair this is to replace them, and even though only one of the control modules is causing the drain, they both need to be replaced at the same time, or you will have more problems. Power seat module shorts and drains battery. Since the majority of fuses are for the seat adjustments. To change the oil you will need: 9 qts of Mobil 1 European Car Formula I believe 0-40W A Filter, most au … tozones will be able to look it up and grab ya one.
To completely flatten the battery in 3 to 4 days is quite some draw, the Comand would turn off when the battery got down to 11,75 volts. I suggest mercedes create a better warning system for equipment failures like the seat control modules and fuel pump. The phoenix dealership initially replaced original fuel filter, and never thought to check if original fuel pump needed replacing. Membership is extended to non-owners with a genuine interest in the best engineered car in the world. By the way, I've just corrected my vehicle details. The contact stated that the vehicle failed to start.
You would need to take around 2 amps overnight to drain a car battery that is in reasonable condition. The reading was 200ma, sometimes 125ma. Cold weather reduces the resilience of the battery in any case. Connect ignition and ground to connections 85 and 86 of the relay as well. The dealer stated the seat controls for the passenger seat drained the battery and the seat control module needed to be replaced.
The latter is for the convenience mode which pushes back the seat and puts the steering wheel out of the way for easy in and out access to the drivers seat. Remove the 3 screws holding the door latch and disconnect the wire from the panel near the front of the door. You could either take the car for a decent long run half an hour minimum each weekend, or you could help the battery by trickle charging overnight. Typical idle current should be 50 -80 mA I believe. I had a 210 car with a. I had to block the drive door switch to get the car to go to sleep. I hope this helps because it took me a while to figure it out.
I checked all the door and trunk switches. The relay will only take about 200 mA when the ignition is on, and nothing when the ignition is on. The manufacturer was not made aware of the failure. Primary candidates in these situation seem to be seat control modules, air pump for the central locking, and the booster heater, but I think those are only fitted on the diesel variants. Information redacted pursuant to the freedom of information act foia , 5 u. That being said, you might want to invest in a set of ramps or a hydraulic style pump jack. Power seat control module for both driver and passenger drain the battery to a extent that car can not be started up.
Sources: Bay area dealerships, a repair shop and online forums. Pull the oil cap piston out of the hole and take notice of the filter and the 4 or 5 rubber rings around the plastic piston. Its a little tricky to trouble shoot. This is a common problem. Failing which, where should he go, or how can he be assisted with, or assured on the matters you raise? Considering the expense to maintain a mercedes, as well as the cost of the car, you would think the service staff would be more proactive with customer service.