Hi MB owners. I've just resolved a problem on my W203 coupe which might me of interest to other W203 owners. ODB Scanner was reporting the usual P0171 and msisfire codes so like most people I rushed out and brought a Bosch MAF (£230!). Replaced the MAF but still no better (rough idle and poor acceleration). I took the airbox off again today and had a good look around and found a vacuum pipe had perished under the airbox. Quick fix (i.e. cut of the perished bit and re-attached) and all is good
The chap at KMS told me that sell s*#t loads of W203 MAF's!!!...Well they would if the scan tools point to the MAF.
If you want to save yourself a hefty bill and buying bits you don't need please PM me and I will give you some pointers on checking this vacuum lead.
I suspect this will prove to me a common problem as the rubber hose sit's in a very hot and mucky location and prone to wear under these conditions.
Pretty poor design to be honest. MB should have substituted the cable for a different material.
The chap at KMS told me that sell s*#t loads of W203 MAF's!!!...Well they would if the scan tools point to the MAF.
If you want to save yourself a hefty bill and buying bits you don't need please PM me and I will give you some pointers on checking this vacuum lead.
I suspect this will prove to me a common problem as the rubber hose sit's in a very hot and mucky location and prone to wear under these conditions.
Pretty poor design to be honest. MB should have substituted the cable for a different material.