What size spanner for bleeding brakes on W202?

[wongl]

Planning to bleed the brakes on both my W202 (one is 1995 and the other is 1998), but cannot find any reference in the Hayes Manual or online for the correct spanner size.

Any ideas?

Also any ideas how much brake fluid I need to buy from Stealer per car?

Thanks

 

[andy_k]

you don't need to buy brake fluid from the stealers and a rough guide would be about a litre per car to flush the whole system through.

Be careful though because ABS systems aren't as easy to bleed as the older systems and a few quid saved by doing the job yourself could easily end up costing you a lot more when something goes wrong - a local independent garage (doesn't even have to be a Merc specialist) will be able to do the brakes in less than an hour and it shouldn't cost much.

Andy

ps - usual size would be a 3/8" spanner for brake nipples

 

[Dieselman]

you don't need to buy brake fluid from the stealers and a rough guide would be about a litre per car to flush the whole system through.

Be careful though because ABS systems aren't as easy to bleed as the older systems and a few quid saved by doing the job yourself could easily end up costing you a lot more when something goes wrong - a local independent garage (doesn't even have to be a Merc specialist) will be able to do the brakes in less than an hour and it shouldn't cost much.

Andy

ps - usual size would be a 3/8" spanner for brake nipples

Surely you mean 9mm Andy. MB never used anything as quaint as AF sizes.

You should be Ok bleeding the ABS system.

Two ways to do it, either gravity bleed it or better have someone apply pressure to the brake pedal then open the bleed nipple and quickly shut it again before the pedal travels too far. This will give a good purge whilst guarenteeing no air enters and the master cylinder doesn't travel into a possibly corroded section at the bottom end of travel.

If you can press the calipers back with some G cramps. This reduces the space in the calipers so ensures all the fluid gets changed.

 

[wongl]

Surely you mean 9mm Andy. MB never used anything as quaint as AF sizes.

You should be Ok bleeding the ABS system.

Two ways to do it, either gravity bleed it or better have someone apply pressure to the brake pedal then open the bleed nipple and quickly shut it again before the pedal travels too far. This will give a good purge whilst guarenteeing no air enters and the master cylinder doesn't travel into a possibly corroded section at the bottom end of travel.

If you can press the calipers back with some G cramps. This reduces the space in the calipers so ensures all the fluid gets changed.

Many thanks, I was going to get one of the pressurised bleed system (using the tyre pressure).

I paid the dealer to change the brake fluid on my A170CDI at a recent service, but noticed latter that the brake fuild was still dirty when I collected the car - interestingly they charged me for the labour to change the brake fluid but did not charge me for the brake fluid. Neither was there a tick on the service sheet to indicate that the technician had done any such work.

I suspected that they hadn't changed the brake fluid and asked for the brake fluid to be changed again FOC. This they did and I was able to watch the technician do it with a presurised system. Didn't look too difficult at all, just needed a pressurised system, a bottle to collect the old fluid and a spanner.

Though I will do it myself on my other two C180's. This way I can be sure it is done and eliminate any risk of being charged for work they didn't do.

 

[Dieselman]

If you use an ezi-bleed keep the pressure really low, 2-3 psi, otherwise you run a big risk of fluid everywhere.