I have a 1988 190 E 2.6L 5-Speed. Does that motor have CIS? I ask because the other day there was a discussion about CAIs and omegabenz mentioned that CIS Benzs " do better with a Mercedes air filter because the CIS throttle plate is calibrated for the resistance of the air filter". I currently have a K&N in.

BTW, I am mixed about the K&N debate. If I get just one more horsepower out that motor, I'll be happy. 158 horsepower never felt so slow. The car had the K&N in it when I bought it two years ago. Last month I cleaned and oiled it. But if it will work better with the stock MB filter, I'll get one. My wife just got a 2004 Volvo XC70 and I put a K&N in it. Who knows?

Thanks for your time.

I have tried all three. The cold air intake, stock and stock with K&N. Will be keeping the K&N filter in.

These are some improvements AMG used on the stock air box design.

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1993 500E
http://2phast.com/500e/500e-sig.jpg

2Phast - Thanks for the reply. As you can see my question was an off-shoot of the other, larger, discussion taking place here as well and to which you are providing your usual sane and sober judgement. I love to see those pictures of the AMG motors. And thanks not just for your reply but for all of the help and advice and pictures you have been providing us over the years. Bravo!

But, does my 2.6L motor have CIS or not? If it does, I'll get the stock air filter. I would love to drive someone else's 190 E 2.6L just to see if mine is normally slow or abnormally slow. At least with the 5-Speed, I can make the motor sing.

Happy motoring.

Yes it is CIS, CIS-E to be exact.
I've never heard of this "air flow sensor plate tuned to the stock airfilter" stuff before, makes little sense to me.

Gilly

Yes, CIS and no, the "air flow sensor plate tuned to the stock air filter assembly is hogwash" There is no such notion of backpressure on a TB intake, although too much air could be a problem on CIS injected vehicles, our ECU's don't control fuel distribution like the later model EFI ODBII vehicles, on those, if the air into the TB increases, the ECU will compensate with more fuel to keep the air/fuel ratios correct. If you increase air flow, then you need to increase fuel delivery, the EHA can be tweaked a bit to deliver more fuel, thats one way and it needs to be done by hand.

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1993 500E
http://2phast.com/500e/500e-sig.jpg

I'm gonna leave it alone, then. Like you, 2Phast, I'll keep the K&N filter in. I take it your 190E has CIS, also. If it's good enough for you then it's good enough for me. Thanks to all. Case closed.

Unless someone writes in that I can swiss cheese the air box and make more noise and lower cruising RPM. Then, I'm all over that.

M104 3.2 Electronic fuel injected is better

Your car is CIS for sure. No 2.6 was electronic fuel injection.

My friend put Nitrous on his 2.6 and it was fast, but dont pop the juice at less than 2000 rpm or you will blow the intake off.

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Current Stable:
1994 S500 v140, 210k miles, white with grey.

Former Mercedes in the Stable:
1983 300CD Turbo diesel 515k mi sold (rumor has it, that it has 750k miles on it now)
1984 300CD Turbo Diesel 150 k mi sold
1982 300D Turbo Diesel 225 sold
1987 300D Turbo Diesel 255k mi sold
1988 300 CE AMG Hammer 15k mi sold
1986 "300E" Amg Hammer 88k mi sold (it was really a 200, not even an E (124.020)
1992 500E 156k mi sold
etc.

Not a real accurate statement. CIS-E is electronic fuel injection, it just isn't sequential fuel injection.

Gilly

C'MON down to the nations capitol and I willtake you for a spin in the WHITE LIGHTNING !!!!!!!!!! 1991 190E 2.6 5-SPEEEEEEEEEEED
and we will compare notes