PeachParts Mercedes-Benz Forum - View Single Post - '95 E420 - DM Codes 3, 4 & 25

Syntax26 · #12 05-09-2008, 07:13 PM

Jim,

Why thank you for the compliment on "well-reported". As I mentioned, I'm somewhat of an anal guy. LOL!

I'm home from work and about to head into the garage...trusty golden retriever as my assistant. (He is more intelligent than I...even with automotive matters).

AS to the secondary air injection system: I don't know if it works upon cold start. I'll try to figure this out. And the valves.

AS to the MAF contamination: I'm pretty sure the/this '95 E420 is hot wire versus hot film. So according to my Bentley E-Class Bible, and my understanding of looking down the MAF throat and seeing the wire configuration (V shaped). When I mentioned before I had cleaned it...I had read your website (4a) and ended up buying the CRC cleaner. But...I was only able so far to spray it down the throat (through the screen)...NOT able yet to disassemble and get right to the wire. Maybe this weekend (even though I'm working a car show.)

As to the brake switch: So ironic you mention this can (does) have an effect on lambda readings, in light of the fact I've been serially working on this issue WITHOUT thinking there could be any connection/relation. My warning light comes on for outside lights - comes on upon brake pedal activation - and despite switching all known brake light bulbs (including the often over-looked "rear window" bulb)...the problem has persisted. A few days ago I decided to undertake replacement of the switch ONCE I solved the ignition/injection code issues. So mabye I should "un-serialize" my process and jump on this right away? Sounds like it. So I ask (since I haven't yet had time to do the reseach): Where might I find this switch? I was going to start my search in the master cylinder area.

Well, let me end by returning a compliment to you. I joined this site about a year ago - and during that time I've read hundreds (if not thousands) of your posts/replies assisting others. I have a great deal of respect for you and your efforts (and the efforts of some other gentlemen I see offering much assistance on here (ADalton, Deanyel, Larry Delor, and some others). And I've read your website many times where you share your knowledge. I think this is the way all people should live their lives - helping others - whether it be in a forum like this, or elsewhere. So if I was a betting man, I'd bet your friends respect you?

So thanks...I'm going to get to work. By the way, I tried to help someone out on here today - referred him to the "code reading instructions" I had picked up on here that were posted by someone else. Hope it helped him.

Jim