Hi Everyone,

I really enjoy reading this forum and usually find answers to all my questions here as someone has already asked them before me.

For the last two days I've tried to search on the internet where the 38pin diagnostics connector is located on a Mercedes S320 2000 W220 model.

most people say it is near the fuse cluster under the hood but I can't find it. Could anyone kindly show me where it is on this picture which I've included in this thread. Thanks in advance.

W. Ahmed

ENGINE VIEW

S320? It's either S430 or S500 for 2000. At least in the USA.

There isn't one on a W220. The only diagnostic connection is done throught the OBD II connector in the driver's underdash panel, near the parking brake pedal.
The W140 S-class used it up to 1999. It was under the plastic cover on the
pass side shock tower in the engine bay.
Dr.D

Dr. Diesel - I've got the 38 pin connector in my '99 E300 as well as the OBDII connector under the dash. I have a code reader for the under dash connector, but found lots of codes when someone read the 38 pin connector for me. My OBDII code reader showed none of those codes. Is there a reasonable DIY reader for the 38 pin connector?

Thanks.

Len

Hi,

Thanks for everyone's reply.

my car is s320 because I'm in UK. I have recently bought an expensive kit which connects to the 38 pin connector on S-class year 2000 W220.

I have been assured several times by the vendor that this connector does exist on this model and is hidden near the coolant bottle or fuse box. Could anyone who has this particular model help me find this 38 pin connector thanks.

W. Ahmed

LenI have a Snap-on scanner with the MB software and cables to diagnose systems through the 38pin data link. That gives you access to all vehicle controllers and data. The FED required OBDII connector in the underdash only provides the FED madated OBD PO codes. My Scanner was $4000. The MB SDS machine I use at work can be purchased but, runs $13,000 with software and license keys. My Snap-on unit only will talk to major units like Engine, Trans, EIS, ABS, and Shifter. The MB computer talks to all control units on the CAN bus like Radio, Doors, Seats, ect....

I think you got Scammed. The 1999 S320 was the last year S class to use a 38 pin connector. The 2000+ w220 S class connects under the dash and is hardwired to the igniton switch for diagnostics using the OBD style 16 pin connector. Sorry.

Dr.D

Thanks Dr. D.

I am now asking the vendor for a return on the product. I beilieve you are right as after hours of search I cannot find the 38pin socket :-(

Regards
W. Ahmed