Hi All,

Ever since I've owned the car I've noticed that there's a hole on top of the air filter cover. It has grommet on it. What is it for? Is it supposed to be plugged? I'm wondering since it lets air into the air mass flow meter by bypassing the filter...


thanks,

__________________
sjsfiji

'87 W124 260E (DD)
98K orig. mi. @7/15
CLK 7-Spoke Forged Wheels
Neuspeed springs/Bilstein Sport
4/3 bump (F/R)

'97 993 Carrera
106K orig. mi.
Always driven like it's stolen

The hole is there for the 3mm allen to adjust the A/F duty cycle

should this be plugged while not in use?

__________________
sjsfiji

'87 W124 260E (DD)
98K orig. mi. @7/15
CLK 7-Spoke Forged Wheels
Neuspeed springs/Bilstein Sport
4/3 bump (F/R)

'97 993 Carrera
106K orig. mi.
Always driven like it's stolen

It leads to the tower between the air flow sensor inlet and the fuel distributor in your pictures from a few days ago.

By design, air can't get into the engine through that hole. There isn't a cover for that hole.

Sixto
95 S420
87 300SDL

Thanks Sixto, guess I don't have to fiddle nor worry 'bout it...

cheers,

__________________
sjsfiji

'87 W124 260E (DD)
98K orig. mi. @7/15
CLK 7-Spoke Forged Wheels
Neuspeed springs/Bilstein Sport
4/3 bump (F/R)

'97 993 Carrera
106K orig. mi.
Always driven like it's stolen