Cleaning the MAF may not be sufficient and some contact cleaners can leave residues so you would be better with carb cleaner or a dedicated MAF cleaner such as this...
https://www.ebay.co.uk/itm/CRC-Air-Sens ... SwcOFaOS1n
I'd be pretty surprised if cleaning it sorted your problem though (esp if disconnecting it makes no difference). I'd be taking a long hard look at the EGR if I were you.
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Rough idle and engine warning light
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ph001
- Lifer
- Posts: 3870
- Joined: Mon Oct 31, 2016 5:53 pm
- Location: N. Yorkshire.
Rough idle and engine warning light
2007 E85 Z4 3.0Si manual 
19" CSL's | Eibach Springs | Aeroskirts | Z4M front bumper | Clear brake light | ZHP | RCH+| Stubby
2004 E46 M3 coupe manual - gone but not forgotten.
19" CSL's | Eibach Springs | Aeroskirts | Z4M front bumper | Clear brake light | ZHP | RCH+| Stubby
2004 E46 M3 coupe manual - gone but not forgotten.