where is the absolute pressure switch?

my 93 190E 2.6 is doing the same thing with throwing error code 16, and ive noticed that my vacuum has become alot weaker recently. I have replaced the EGR valve, the vacuum lines and rubber hoses for the entire air pump/egr system last summer when the car failed smog, so everything there besides the switchover valves are new.

I tested the EGR valve with a vacuum pump and it does open and close, so I'm not sure where this error 16 is being thrown from.

I had replaced pretty much all of the hard vacuum line and rubber connectors and mine would still throw the code. So I just disabled the EGR, and ignore the Check Engine light.

__________________
-diesel is not just a fuel, its a way of life-
'15 GLK250 Bluetec 118k - mine - (OC-123,800)
'17 Metris(VITO!) - 37k - wifes (OC-41k)
'09 Sprinter 3500 Winnebago View - 62k (OC - 67k)
'13 ML350 Bluetec - 95k - dad's (OC-98k)
'01 SL500 - 103k(km) - dad's (OC-110,000km)
'16 E400 4matic Sedan - 148k - Brothers (OC-155k)

Well, that's one way around it!

Out of curiosity, do you have any info on how much vacuum line, and which rubber connectors to buy in order to replace all the old stuff in your car? I'm looking to do this on my M103 190E but I'm not too sure where to start. Do you have an old invoice or any memory of about how much line and what size you ordered?

You can get a pretty good idea from the individual part number descriptions in the EPC. It'll say something like "from x to y, 700mm". Just add up all of the pieces. Sold by the meter.

__________________
1988 California version 260E (W124)
Anthracite Grey/Palomino
Owned since new and still going strong and smooth
MBCA member

Past Mercedes-Benz:
1986 190E Baby Benz
1967 230 Inherited from mom when she downsized
1959 220S Introduced me to the joys of keepin' 'em goin'

There are only 10 kinds of people in the world--those who understand binary and those who don't

If you want to know???

The system on 1990 + later M103's is monitored by vacuum changes at the EZL.

__________________
MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator

Exactly. That's why I gave up trying to "please" it, and disabled it.

__________________
-diesel is not just a fuel, its a way of life-
'15 GLK250 Bluetec 118k - mine - (OC-123,800)
'17 Metris(VITO!) - 37k - wifes (OC-41k)
'09 Sprinter 3500 Winnebago View - 62k (OC - 67k)
'13 ML350 Bluetec - 95k - dad's (OC-98k)
'01 SL500 - 103k(km) - dad's (OC-110,000km)
'16 E400 4matic Sedan - 148k - Brothers (OC-155k)

Awesome, thanks. I didn't even think about looking through the EPC.