Hi all. Have a om606 non turbo. Finally threw a p0400 EGR code and wondering whether to leave stock and fix, or just delete EGR. If so, which has been people's best technique- the resistors/diode electronic fix, or more mechanical with safety wire. Fortunately no inspections here.
Thanks all.

I have the same car, and the '97 is a problematic year as far as EGR deletion is concerned. The only technique I have discovered that will not trigger a check engine light is to block the exhaust and provide filtered air to the EGR valve instead of exhaust. The sensor on top of the valve needs air flowing by. Not sure if this would address your 400 code, but it might. I have not yet done this to my car as in VA the emissions stuff must appear stock, even though our inspections do not check emissions.

__________________
'97 E 300 D

If the 1997 EGR must see flow (my 1996 does not) you can re-plumb the input to the air filter box or you can install a small filter (lawn mower, motorcycle, etc.) at the input. There will be airflow to keep the electronics happy but it will be clean air rather than exhaust.

Once that is done, remove and clean the intake manifold and associated plumbing of all accumulated carbon.

Jeremy

__________________

"Buster" in the '95

Our all-Diesel family
1996 E300D (W210) . .338,000 miles Wife's car
2005 E320 CDI . . 113,000 miles My car
Santa Rosa population 176,762 (2022)
Total. . . . . . . . . . . . 627,762
"Oh lord won't you buy me a Mercedes Benz."
-- Janis Joplin, October 1, 1970

Thanks. Any pics or better movies on intake removal.
Looks like a lot of stuff going on, and I hate breaking stuff.

I blocked off the EGR valve. Made a template with aluminum from Home Depot Gutter flashing. It was a cheap solution and the car didn't give a code.

I know others rigged up something more than this, but I didn't need to.

Pabster

egr delete son

__________________
1999 w140, quit voting to old, and to old to fight, a god damned veteran, deutschland deutschland uber alles uber alles in der welt

up to top for a person needing help

__________________
1999 w140, quit voting to old, and to old to fight, a god damned veteran, deutschland deutschland uber alles uber alles in der welt

So I just got a 97 that has had the valve deleted. CEL is still on tho. I have no emissions or inspections where I live. Is this ok? CEL light repaired by cheap digital stick on clock option Lol

__________________
Current stable......
17' Rogue SV 70k
11’ Saab 9-5 NG 94k
10’ e550 4matic 185k

sold
02' e320 210k
00' e430 167k
01' e320 171k (regret sale)
91' 300d 2.5t 300k (sold to ecoofidaho)
79' 240d 177k (old yellow my avatar)
87' 300d 169k (junk but fast)
85' 300tdt 261k (RBM parts delivery)
85' 300dt 68k (one owner cream puff)
82' 240d 250k
84' 300dt 198k (sold to diesel don)
91' 190e 2.3 61k
88' 260e 140k