1996 Mercedes-Benz Mercedes Benz S Class Coupe - Answered Questions & Fixed issues

Hello I'm an M.B. tech- lot's of people have had dificulty with that code. The code means just what it means insuficiant air flow. The egr system does the same thing. What generaly ends up being the problem is a clogged port in the engine head. Unfortunatly on the air pump the port is near the exhaust side of the deck and you must remove the head to repair it where as the egr you can clean the port at the throttle motor. First thing you need to do is make sure there are no more codes in the system. The way that the ecu moniters the operation of the air pump is map senser for vac to the switcthover valve which is the same switch over valve for the egr located in the front of the cam cover. Next it will use the front o2s to moniter the airflow. Also it moniters the airpump relay operation. Operation is started during open loop by the coolant temp. senser. I beleive that this vehicle could possibly have a diagnostic mod along with the engine ecu which moniters the ecu performance. This also needs to be scanned for codes, They discontinued these in late 95. Make sure you have source vac, to the switchover valve-next moniter switchover valve otlet to diverter valve during air pump operation. To properly moniter o2 sensers you will need the proper equipment. Inspect all the airpump plumming as well. assuming the air pump is getting power and operating properly. I would recommend taking the vehicle to an M.B. repair shop and have the system function tested and scanned-with a flow check for the clogged air injection ports. Depending on how many miles I would just do a valve job. If you have any more questions just post and I will get back to you

this is an indication that there is a problem in the cooling system. Check the radiator cap is operating correctly. Check for correct operation of cooling fans ( replace if you have a viscous fan hub on the fan). Have a flow test done on the radiator as there may be too many cores blocked for efficient cooling. Run the fault codes to check for air/fuel /timing issues that will affect the engine operating temperature.

all dip sticks for engine and auto transmition are under the bonnet oil for engine ( as you look into engine bay ) should be next to water pump fan belt ect trans fluid dip stick should be same side but nearer the back of the engine bay

I had a 94 s420 and now my 96 s320 same problem. nothing with lubricating but u can try buying some. I was told Mercedes come from Germany where it always is cool or cold. they have an inuation made of this hard like tar material. you may even see it on your glass and see some chunks that feel off after time and time being heated here in the northeast or where your from. I know my cars interior reaches at times in the summer sometimes 120f. If you take down the headliner u should be able to see if it is that tar board insulation. I just leave mine closed.

The oil in the reservoir tank ( radiator ) may be from a cracked transmission oil cooler in the radiator. Have it pressure tested

take it to your locale repair shop, if you dont know how, where or with what you should leave it to those who know what there doing.

Check transmission fluid, or have the transmission serviced. ie - oil and filter changed.

Hello and welcome to FixYa!
Please perform the following to gain access to the window motor.
- Remove the door trims, they are secured by plastic snaps so you will just have to pull them off carefully, be sure to look if there are little screws that needs to be removed. - Once you removed the door trims, carefully remove the connectors of the power windows behind the door trim to pull it out thoroughly. - Remove the plastic that's covers the door frame. - You will need a 10mm socket to remove the glass and motor that mounts to the door frame - You may now replace the power window motor and do the procedure vise versa on installation.
Hope this helps and thank you for using FixYa! Have a good one!

for the seats its fuse 40 41 rhs LHS is37 and 38 fuse 30 is for memory and steering column adjustment and both seats

FROM THE FRONT LOOKING BACKWARDS.....
1...2
3...4
5...6
7...8

Recharge freon level.

First what he needs to look at is whether or not the secondary air injection(air pump)is turning on. Works like an A/C compressor with a clutch. Commonly what happens is that moisture builds up in the pump itself and cuases it to sieze up. Have him check the pump first then make sure the check valves are good working order. He should be able to hook an OBD 2 scanner to this and be able to retrieve codes. If he says that's not possible, he does not know what he is doing. It's a '96. The OBD2 compliance became standard in '95. If you need further assistance, please let me know. These are great cars!!

Radio code is found with the owners manual. If you are without that go to an MB dealer so they can verify ownership and look up the code.

cmpressor problem.

counterclockwise

Your T.P.S needs to be tuned go to dealer they can help do not attept this on your own

top front of motor.

2500 dollars ,you joking or what a petrol one at that ,petrol engined vehicle isnt worth a light ,diesel yes but a gas guzzling CO2 emmiting monster ,with the cost of road tax as high as it is on this pollution machine .No its not worth anything if fact the present owner should pay you to take it away.This vehicle in the UK would sell for about 100/500pounds if your lucky and the top end price is if its working ok with a full years road tax and roadworthy certificate.here in spain about 1000euros or so, now a diesel in full working condition with papers in order and roadworthyness certificate about 2500euros .Dont touch this motor unless its given to you for FREE .You are joking about the price?? having a wind up ?? taking the proverbial pi??

remove the cover if you have one and remove them

It should be on top of the engine, drivers side, under a black plastic cap in the front. These cars used a cartridge type filter, which is just the paper element and a seal ring.