SLK 230 /1999 Transmission slow to change up sometimes?

[srdtvr]

- My SLK 230 sometimes wont change up on "kick down" and has a flat spot kind of feel also it can sometime hold a gear for longer than you would expect before changing down ?
I think it could be a simple fix as it drives fine otherwise - most of the time.

Any ideas ?

Cheers
Steve

[r129sl]

Common problem. MAF sensor has become contaminated with oil due to the crankcase breather system blocking at the inlet manifold. You need a new MAF sensor and you need to clean out the breather nozzles at the inlet manifold, not an easy job.

[srdtvr]

Thanks for the reply
I suspected the MAF sensor for some time and have cleaned it with no real improvement.
This breather problem - does the manifold need to come off to clean it or is there an easier way?

[r129sl]

There's a bit of dismantling required. There are extensive instructions in the Mercedes-Benz Club technical archive. An experienced and confident DIYer could do it but a beginner might be out of his depth.

[srdtvr]

Thanks for that
I found that and it looks pretty straight forward so will give a go when time allows
thanks for the reply