hey guys, apart from regular maint and doing the head gasket on this car, I'm still a mb newbie. while driving a very long distance today, I got a check engine light while up in the mountains in the middle of nowhere. the car drove and made it back like a champ though. I was slightly worried about being stranded and being attacked by wolves really!

I did a search and found some posts about later 124 models ailing from the same light. none mentioned how I should pull a code. the vehicle is a 88 300e, hence my name. how do I pull a code on this vehicle?? I read about a black box with a switch and led. press for 2-4 seconds and then what happens? please verify. obd2 and scan tools have spoiled me and made me ignorant. I thank you in advance, I need to get this solved so I can drive with confidence.

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88 300e
92 mr2

you can go to autozone and have them pull out the bad codes for you...it's next to the battery, the black box, underneath is the button...

I prefer to stay out of autozone. ok so I push the button and count how many times the led blinks? thats it? thanks for responding.

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88 300e
92 mr2

http://www.troublecodes.net/MB/

I need to purchase equipment for this?
install on-off readout ratio tester? connect impluse counter? if I do, that just sucks.

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88 300e
92 mr2

I found the port. held the button down for 2-3 seconds and #4led blinked 8 times. thats it. I will try and search around. if you know what this means, please inform me. thanks. I will check in the link posted above but those codes are listed as 90 and above. mine is a 88. would they be the same codes?

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88 300e
92 mr2

it was the altitude capsule. I just called my buddy's shop to get advice. very helpful and time saving to say the least. how many of you guys would pay $5 to get immediate advice from a mercedes pro over the phone? he always helps me out but I feel he should be getting paid for his time. CASE CLOSED! I'm worry free, for now anyways.

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88 300e
92 mr2

Code 8.. altitude signal..
Right there in the post I sent you..

Congratulations on finding the problem & having a buddy like that.
Btw. if you look at the 1990-93 codes,( in the link provided by Arthur ), # 8 has the correct description of your problem.
May want to bookmark that link.

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2007 C 230 Sport.

yea I read it, I was unsure whether the codes would be the same since it said 90-91 190 and 300 series and mine was a couple of years older. page was bookmarked, thanks for all your help fellas. I gotta send the guys at modern specialist a pie or something. they have been my saviors in many a situations with the 944 and now the 300. I owe them some gratitude.

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88 300e
92 mr2

Yours codes are the same as the chart because you have early California Emmissions.
Federal Emmissions dd not start til the chart date...
Any chassis with a built-in Led/Sw and a CE lamp is Cal before '90